Strategies for tackling obesity in the UK/England over the past 5 years

In 2016, the government published the first of two child obesity strategies for England⁽²⁵⁾. This amounted to a landmark in health policy as, for the first time, the effects of poor diet on the economy, welfare services and an individual's opportunities throughout life were the responsibility of cross-government departments. The first part of the childhood obesity plan ⁽²⁵⁾ announced the government's commitment to reduce free sugars from children's diets through the implementation of a soft drinks industry levy (SDIL) and a tightly monitored, voluntary, sugar reduction programme. Other commitments included supporting businesses, schools and the public sector to provide healthier options, and supporting individuals and families to make healthier choices. Part 2 of the childhood obesity plan, published in 2018⁽²⁶⁾, highlighted the government's programme on reducing energy from products that contribute significantly to children's energy intakes, energy labelling in the out-of-home sector (e.g. restaurants, cafes and takeaways) and exploration of further controls on advertising and price promotions. Further details of both plans are outlined in Table 1. What is clear is that these programmes alone will only represent a step in the ambition to reduce the free sugars and energy content of our diets. This is because the sugar reduction programme focuses on the largest contributors of free sugars to the diet of children. From an energy perspective, the sugar and energy reduction programmes together with the SDIL will reflect about 50 % of children's energy intakes⁽²⁶⁾ – though this is likely to be an underestimate owing to the limited data available for the eating out, and home delivery sectors⁽²⁷⁾.

Table 1. Actions presented in the childhood obesity plan, chapters 1 and 2

GBSF, government buying standards for food and catering services; OOH, out-of-home.

Sources: Childhood Obesity Plan – Chapter 1⁽²⁵⁾; Childhood Obesity Plan – Chapter 2⁽²⁶⁾.

Early in the COVID-19 pandemic in 2020, reports began to emerge that those living with obesity were over represented in hospital intensive care units^{(Reference Richards-Belle, Orzechowska and Gould28)}. Emerging evidence indicated that overweight or obesity was associated with an increased risk of hospitalisation, severe symptoms, the need for more advanced treatment and death from COVID-19. These risks increased with increasing BMI⁽²⁹⁾. In light of this evidence, the government made further commitments to reduce obesity in the UK and published Tackling obesity: empowering adults and children to live healthier lives ⁽³⁰⁾. Key areas included the introduction of a new ‘better health’ campaign; energy labelling in large restaurants, cafes and takeaways; ending promotions of HFSS products in store and online; banning advertising of HFSS products on TV and online before 21⋅00 h; extending weight management services to reach more people; and consulting to gather views and evidence on the existing ‘traffic light’ food label, and the intention to enforce energy labelling on alcohol.

Dietary health in England

While policy action has had some impact, average UK diets still do not meet current recommendations (Table 2). From 2008 to 2019, average intakes across most age groups have improved in only a few categories (e.g. salt, red and processed meat and sugar-sweetened beverages). In most other categories, intakes have either not changed (i.e. fruits and vegetables, fibre and saturated fats) or have worsened (i.e. folate and iron from food sources)^(6,31) .

Table 2. UK dietary recommendations and intakes, by age group

AOAC, American Association of Analytical Chemists.

Sources: National Diet and Nutrition Survey (NDNS) years 9–11 (2016/17–2018/19)⁽⁶⁾; NDNS: assessment of salt intake from urinary sodium in adults (aged 19–64 years in England, 2018–2019)⁽³¹⁾; COMA report on Nutritional Aspects of Cardiovascular Disease (1994)⁽⁵⁴⁾; SACN Salt and Health report (2003)⁽⁵⁵⁾; SACN Carbohydrates and Health report (2015)⁽¹⁴⁾; SACN Saturated Fats and Health report (2019)⁽⁵⁶⁾.

Recommendations for energy intake are particularly relevant given that energy intakes in excess of requirements increase the risk of weight gain and obesity. In England, energy intakes exceed current recommendations by 585⋅76 kJ (140 kcal) to 2092 kJ (500 kcal) daily, depending on age and sex⁽³²⁾ (Table 3). At a population level, on average, adults also consume 836⋅8 kJ (200 kcal)–1255⋅2 kJ (300 kcal) excess energy a day. These figures are conservative estimates as the analysis assumes no further weight gain occurs. This means that for many the number of excess energy consumed will be higher⁽³²⁾.

Table 3. Estimated energy requirements (EAR), estimated energy intakes and excess energy intakes by age band, sex and weight status

EAR, estimated energy requirements.

*Estimated from the Henry equations using average height and weight data (Health Survey for England 2012–2014) and average physical activity levels. Excess energy intake is the difference between energy intakes and the EAR.

Source: Calorie reduction: the scope and ambition for action⁽³²⁾.

Given excess energy intakes, it is no surprise that 68 % of men and 60 % of women are overweight or obese, while in children, approximately 30 % of those aged 2–15 are overweight or obese⁽³³⁾. As with adults⁽³⁴⁾, overweight and obesity prevalence in children has increased over time (from 2006 to 2020), particularly in girls⁽³⁵⁾. Just under 10 % of children entering primary school in England (age 4–5) are obese, while 21 % of children are obese by the time they leave primary school (age 10–11)^(34,36) .

While obesity is a concern across all age and sex groups, children living in the most deprived areas are more than twice as likely to be obese than those living in the least deprived areas (13⋅3 v. 6⋅0 % for children aged 4–5 years and 27⋅5 v. 11⋅5 % for children aged 10–11 years)⁽³⁶⁾. Between 2006/7 and 2019/20, the gap in obesity prevalence increased by 1⋅8 and 4⋅8 percentage points for children aged 4–5 and 10–11 years, respectively⁽³⁶⁾. While there is a focus on increasing physical activity levels to achieve weight loss or to prevent excess weight gain, evidence from randomised controlled trials have shown that interventions that include a dietary component are most effective at reducing BMI, particularly in young children aged up to 5 years^{(Reference Brown, Moore and Hooper37)}.

Sugar reduction programme: where are we now?

The sugar reduction programme challenged the food industry to reduce the total sugar content in the categories of food that contribute most to total sugar intakes of children aged up to 18 years by 20 % by 2020 (sales weighted average total sugar content in grams per 100 g compared with baseline year 2015)⁽³⁸⁾. Progress reporting to 2019 showed a mixed picture for the ten food product categories covered by the programme (Table 4)⁽³⁸⁾. While there were reductions in sugar content of all categories, except puddings where there was a slight increase, the overall reduction was less than hoped. Reductions were large in some categories (i.e. breakfast cereals and yogurts and fromage frais) but almost negligible in others (i.e. chocolate confectionary and sweet confectionary). Less progress was made for food products sold for eating out of the home with a reduction of 0⋅3 % where large reductions made in some categories (e.g. breakfast cereals) were met with large increases in others (e.g. chocolate confectionary).

Table 4. Summary of change in sugar content by food category (2015–2019)

SWA, sales weighted average; SA, simple average.

* The mean weighted by total sales, which gives more influence to products with higher sales.

^† The simple arithmetic mean, giving products equal influence. The baseline year is 2017. The analysis is based on more limited data and less comprehensive nutrition information than that used for retailers- and manufacturer-branded products.

^‡ N/A, not applicable. Data for sweet confectionary in the eating out of home sector has been excluded due to incomparability of results.

^§ The baseline year is 2017 rather than 2015.

Source: Sugar reduction: report on progress between 2015 and 2019⁽³⁸⁾.

Despite the progress made on reducing sugar in foods, its impact on overall sales of sugar has been less dramatic owing to changes in food consumption patterns. For example, sales of retailers and manufacturer-branded products across the ten food categories increased by 3⋅4 and 0⋅8 % per person⁽³⁸⁾. This was driven by large increases in sales of chocolate confectionary (up 16⋅3 %) and sweet spreads and sauces (up 12⋅0 %)⁽³⁸⁾.

The most significant sugar reduction has been in drinks subject to the SDIL which came into effect in April 2018. The aim of the levy is to encourage producers and importers of soft drinks containing free sugars to reformulate their soft drinks and reduce portion sizes⁽³⁹⁾. Analysis in 2020 shows a 43⋅7 % reduction in the total sugar content (per 100 ml) since 2015 for drinks subject to the levy⁽³⁸⁾. Although overall sales (in litres) of drinks subject to the levy have increased by 14⋅9 %, the implementation of the SDIL has meant that total sugar sales from the soft drinks have decreased by 35⋅4 %. Encouragingly, total sugar purchased from drinks subject to the SDIL has decreased across all socioeconomic groups⁽³⁸⁾. Additionally, for drink products sold for out-of-home consumption, there was a reduction of 38⋅5 % in the average total sugar content for drinks subject to the SDIL⁽³⁸⁾.

In May 2018, the voluntary sugar reduction programme was extended to cover unsweetened juice and sweetened milk-based drinks (and milk-substitute drinks). The drinks industry was set with the ambition to reduce the sugar content of unsweetened juice by 5 % by mid-2021, and to reduce the sugar content of sweetened milk-based drinks by 10 % in mid-2019 and 20 % by mid-2021⁽⁴⁰⁾. Progress on the interim ambition is encouraging (Table 5), with pre-packed milk-based products, coffee and tea and milkshake powders, syrups and pods meeting the interim target⁽³⁸⁾. Less progress has been made for drinks sold for consumption outside of the home⁽³⁸⁾.

Table 5. Changes in sugar content by drinks category (2017–2019)

SA, simple average.

* Sales weighted average, the mean weighted by total sales, which gives more influence to products with higher sales.

^† The simple arithmetic mean, giving products equal influence. The baseline year is 2017. The analysis is based on more limited data and less comprehensive nutrition information than that used for retailers- and manufacturer-branded products.

Source: Sugar reduction: report on progress between 2015 and 2019⁽³⁸⁾.

Impact of COVID-19 pandemic on diets in England

Before the COVID-19 pandemic (pre-2020), there was evidence that people were eating out more at restaurants or consuming takeaways and delivered meals⁽⁴¹⁾. Eighteen per cent of meals were eaten out of the home in 2015, up 5 % on 2014⁽⁴¹⁾ while expenditure on takeaway foods was 14 % higher in 2017–2018 compared with 2014⁽⁴²⁾. Meals eaten outside of the home tend to be larger than food bought from retail outlets, such as supermarkets⁽³²⁾, and are associated with higher intakes of fat, sugar and salt⁽⁴¹⁾. Before the pandemic, the eating out-of-home sector provided 20–25 % of an adult's energy intake⁽³²⁾.

Emerging evidence suggests that the COVID-19 pandemic has further nudged individuals and households away from making healthy dietary choices and consuming less energy. The Institute of Fiscal Studies estimated that by May 2020, the total energy content of food and non-alcoholic drinks purchases had increased, on average, by 15 % and were higher than 2019 levels for the remainder of 2020. The total energy content of food and non-alcoholic drinks purchases were above 2019 levels for 90 % of households^{(Reference O'Connell, Smith and Stroud43)}.

The impact of the pandemic on the food landscape, particularly the out-of-home sector, has been no less dramatic. When England went into lockdown in March 2020, the closure of outlets for food consumption outside the home meant that individual and household spending shifted away from sit-down restaurants to at-home meal deliveries. Between March and September 2020, the share of total spending in the eating out-of-home sector increased by 41 %⁽⁴⁴⁾. Meal deliveries, which are traditionally popular as an option for evening meals, expanded into other meal occasions, with an increase in at-home lunch deliveries peaking at nearly 15 % by the end of 2020⁽⁴⁵⁾. At the same time, the market share of fast-food restaurants and chains increased by 13⋅5 %, while full service or sit-down restaurants and pubs market share declined by 3 and 4 %, respectively^{(Reference Kantar46)}.

The reshaping of the food environment to favour fast food outlets and meal delivery companies since the pandemic is likely to exacerbate challenges in improving the nation's diet and health. Although all national health surveys were suspended during the pandemic, increased purchases of dietary energy, along with reported reductions in physical activity levels during the national lockdowns⁽⁴⁷⁾, will likely have increased the prevalence of obesity. A nationally representative survey on 5000 English adults conducted in July 2021 analysed diet and nutritional changes during the pandemic. Forty-one per cent of adults reported to have put on weight since the first lockdown in March 2020 and had gained on average 4⋅1 kg. Almost half (46 %) of adults that reported gaining weight said unhealthy eating habits were the main contributors to their weight gain, and 49 % said they would like to have a healthier diet⁽⁴⁸⁾. While the cited data reflect the situation in England, it is expected that similar impacts of COVID-19 on diet will have been evident across the whole of the UK.

Looking forward

With the potential risks associated with increased prevalence of obesity, in part due to COVID-19, on the horizon it is important that the UK government continue a range of policies to help reduce the burden on individuals, communities, the health and social care system and the economy. At the time of publication of this review (2021), parliament was considering legislation that, if approved, would mandate energy labelling for larger out-of-home businesses. Legislation to restrict promotions of HFSS products is expected to be laid in 2021 and a ban on television advertising of HFSS foods before 21⋅00 h will come into force in 2022⁽⁴⁹⁾.

The National Food Strategy (2021)⁽⁵⁰⁾, an independent review of England's food system, commissioned by UK government, sets out 14 recommendations to improve the nation's health, build resilience in the food system to withstand global shocks; restore nature and halt climate change while meeting the standards the public expect, on health, environment and animal welfare⁽⁵¹⁾. The government's response to the strategy will be published in the near future.

Later in 2021, the fourth annual assessment of progress towards achieving the 20 % reduction ambition for the foods included in the sugar reduction programme is due for publication. This report will also include a second assessment of progress made by industry towards the separate ambitions set for juice and milk-based drinks⁽³⁸⁾.

A follow-up study of the National Diet and Nutrition Survey Rolling Programme, published in late 2021, assessed diet and physical activity in summer and early autumn 2020 during the COVID-19 pandemic⁽⁵²⁾. The study found that, in children aged 2–10 years, mean intakes of free sugars and saturated fat were lower and dietary fibre higher than before the pandemic (but still not meeting recommendations). However, in general, diets were broadly similar at a population average level during this time compared with previous National Diet and Nutrition Survey Rolling Programme assessments – that is, in all age groups (in both sexes), intakes of saturated fat and free sugars exceeded maximum recommendations while consumption of fruit and vegetables, dietary fibre and oily fish was below recommendations. Reported physical activity levels were slightly higher during the study period but there was wide individual variation. These results should be interpreted with caution as the sample who took part in the study cannot be described as a random and representative sample of the UK population.

These assessments will need careful consideration to fully understand the impact of these programmes given the wider changes in the food environment as a result of COVID-19. Advice will continue to be forthcoming from the experts, currently within the Department of Health and Social Care, leading programmes of work.