The UK's national library today serves a wider range of users than ever before. The British Library is the world's largest supplier of vital information to science, technology, business, engineering and academia, either at the walk-in reading rooms at St Pancras, London or remotely from the Document Supply Service in Yorkshire. It has also become an advocate for the implementation of a national collection of foreign, comparative and international legal research materials. Additionally, the Library is a well-used resource for professionals such as social workers and clinicians requiring information about the legal framework within which they operate.