This publication, which is reprinted from the journal Laboratory Animals 1993, 27: 93-107, was drawn up by the Laboratory Animal Breeders Association and the Laboratory Animal Science Association in alliance with the Association of the British Pharmaceutical Industry; the British Laboratory Animal Veterinary Association; the Institute of Animal Technology; the Ministry of Agriculture, Fisheries and Food; the Universities Federation for Animal Welfare; the Animals (Scientific Procedures) Inspectorate of the Home Office, and with comments from the Research Animals Department of the Royal Society for the Prevention of Cruelty to Animals. These various organizations had one common aim in mind: the improvement of the condition and thus the welfare of laboratory animals during transit. The guidelines start with an introductory section on the general requirements of animals in transit and this is followed by detailed information on the needs of the various species. The material is clearly presented and there are a number of drawings of transport containers reprinted from the International Air Transport Association's Live Animals Regulations. This is a very useful, concise and informative document. The adoption of the recommendations contained within it should help to ensure the welfare of laboratory animals in transit.