BBC Health: http://www.bbc.co.uk/health/

Equip: http://www.equip.nhs.uk/

General Medical Council: http://www.gmc-uk.org/

National Electronic Library for Health:  http://www.nelh.nhs.uk/

National Pharmacy Association: http://www.npa.co.uk/  

Numark: http://www.numarkpharmacists.com

Royal Pharmaceutical Society of Great Britain:  http://www.rpsgb.org

The Merck Manual: http://www.merck.com/pubs/