The British Medical Association's GP committee has produced a guide jointly with the NHS Alliance and National Association of Primary Care on personal medical services pilots that will be sent to all GPs. The guide will be issued with a letter warning GPs to 'weigh up the options carefully' before switching to PMS from the traditional general medical services contract. The guidance says many of the advantages claimed for PMS are achievable through GMS contracts with health authority support. The government wants to see most GPs switch to the new contracts by 2004.