I find it quite surprising that anyone in the UK who could afford to buy a house would choose to rent instead.
Obviously social housing is completely different because that is far more secure.
We had a house (with mortgage) but due to a series of misfortunes we had it repossessed. We then had no choice but to rent.
We didn't think we would ever be able to buy again and accepted that. We had no problems with the concept of renting but the reality is rather different.
The first problem was that we have pets (dog and cats) so were restricted as to the properties we could rent. Our first rented house the landlord decided he wanted to sell after we had been there 6 months so we had to leave. Second house the landlord put the rent up twice in a year by £100 each time! We left. Third house landlord was a real pain and would keep letting himself into the property (one time he obviously thought no one was in but I was in bed ill). Fourth house landlord again kept wanting to put the rent up.
We then found a house in the area we wanted, decent size garden for dog but the actually house was a bit scruffy. We ended up being there almost 15 years. In that time the landlord did nothing, not a penny spent on it. We wanted a nice house so we decorated, we put in a new bathroom, bought new carpet, laminate flooring etc. The boiler packed up and we had no hot water or heating for weeks in the winter and the landlord just did not want to know. We had to pay for it
That landlord then decided he wanted to sell so once again we were asked to leave.
I had started to worry about the future - keep moving home plus we are both now early 60's so what would happen when we only have our pensions? Neither of us have a private pension?
Then we were left an inheritance which enabled us to buy a house outright. We are so much happier not having to worry about finding rent every month, worrying whether a landlord will be raising the rent, being able to do exactly what we like to our house.
If there were tighter laws about renting, as there are in other countries, then I think renting would be a reasonable alternative to buying. As it is I definitely don't think it is unless you are lucky and get a decent landlord.
Also I agree with the posters who say in the future there is going to be a massive amount of money to find to pay the rents for pensioners who can't afford them