Just adding my opinion, only because I'm someone who rents and, in your situation, I would certainly sell up and rent.
I've always been reluctant to have every penny tied up in a (mortgage) property and having nothing to live on. When I divorced, I promised myself I would always rent in future and I've never regretted it. Depends on what area of the country you live in; in London and the South-East rents are high, but in the East Midlands, for instance, rents are very doable.
And renting isn't always insecure.....there are many properties attached to large country house estates which can be rented for a lifetime. Other properties are run by charities which rent out cheaply to a specific type of person, or to a certain age range, or alms-houses....the list is endless. Most you can stay in 'forever' if you want to, no-one is going to sell up or turf you out (unless you trash the place or are a nuisance tenant).
Renting frees up my monthly money, and I can move across the country very easily when I want to, without the problem of selling up before I go. In the past (as a single parent) I managed to get a beautiful place for a peppercorn rent, a wing of a lovely old country house....I could never have afforded to buy something like that. Nowadays I rent an apartment, all modernised, but part of a bigger property, it's perfect and in a lovely area. It's so reasonably priced I will be able retire here and still manage to pay the rent on a state pension.
I've never had much money but it has never been a problem renting. Some places want references, but not all do, none of my past (or present) rents have asked for a credit check. Not all rents are done through estate agents, my current renting is done through a private property letting company, they like to meet possible tenants and choose their residents that way. My current rental didn't even ask for a deposit.....
I know it's not ideal for many who prefer to be on the property ladder, but I'm just putting forward the other point of view, there are so many negative comments on here that I think the discussion isn't balanced.
Good luck in whatever you decide to do...!