There a factsheet that you can access on this site: www.google.co.uk/url?sa=t&source=web&cd=10&ved=0CIEBEBYwCQ&url=http%3A%2F%2Fwww.ageuk.org.uk%2Fhome-and-care%2Fhousing-choices%2Fsheltered-housing%2F&rct=j&q=sheltered%20housing&ei=5spvTuyTHIO5hAft1vy_CQ&usg=AFQjCNHvbcepzeO7IsLCyuyuE3xCd5HeiQ&cad=rja
Council-run sheltered or warden assisted housing schemes may be means tested and your df is unlikely to qualify. Buying into a privately-run sheltered/retirement scheme can be risky in terms of resale and the ever-increasing service charges.
The majority of sheltered housing schemes require their residents to be capable of doing their own shopping/cooking/etc as the warden is only available for emergencies. However, this does not prevent some residents accessing services such as home helps, meals on wheels etc.
The opportunity for group social activities very much depends on the residents - some organise outings, and evening entertainment/ daytime activities in their shared common room.
If your df doesnt qualify for sheltered housing run by Almshouses or other charitable trusts, IMO you are best advised to look for other ways of meeting his needs.
Is there a pensioners' luncheon club near to where he lives? Do any local churches host weekly afternoon get togethers for over 60s? Be warned - a single gentleman of a certain age can be much in demand at these gatherings!
Perhaps he could sell his flat or house to fund a move close to one of his dc or provide funds to build an annexe to one of his dc's homes?
I would suggest that he/you speak to an accountant to consider the best ways of safeguarding his wealth from the taxman through gifts, trusts, and assignments but, if he's anything like some older people of my acquaintance, he may not wish to confront his eventual demise and/or, effectively, prefer to keep his loot in a mattress under the bed.