The Local council will be able to advise on local Housing Associations who might be able to help, and it may be possible for them to refer her to a Housing Association for rehousing. Not all retirement accommodation is the same i.e. to be avoided by active pensioners.
My 81 year old FiL lives in Housing Association sheltered accommodation in a large city and there are flats available most of the time. All are one bedroom, but there is a guest flat for visitors to use who want to stay overnight. It has a part time warden and housing officer, etc. He moved there some years ago with his late wife and they did not have to sell their home before moving in (they did sell it though). He's a very private person and lives quite independently of the other residents, going out every day in his car to do his shopping (the car is parked in his spot under the car port). For all intents and purposes, he's living in a nice, private one bed room flat where someone checks on him once a day (sometimes it's a knock on the door and sometimes it's a phone call, all quite unobtrusive). Being rented he doesn't have to worry about replacing the kitchen or bathroom etc., and the service charge is very reasonable.
loobyloo6624 I'm glad you've made your decision. Get advice, accept or ask for support and just keep thinking about how things might be this time next year. 