The Elderly Accommodation Counsel provides all sorts of information on housing for the elderly with regard to sheltered accommodation.  They also have a national database on care homes. 

They can be contacted between 9am-5pm Monday-Friday, at the Third Floor, 89 Albert Embankment, London, SE1 7TP, telephone 0207 820 1343, fax 0207 820 3970 or visit the website www.housingcare.org