The whole "paying more for rental than a mortgage" has been a thing for a while now. Most rental prices I see in estate agent windows are greater than what you'd pay on most 25yr mortgage terms and have been, on and off, for several years. This is in London of course which might be an especially fucked market but I suspect it's widespread throughout the country. The term "tenant paying off my mortgage" is a fairly common one in the BtL crowd.
Capital requirements for mortgages in light of most people being unable to save up 10% or even 5% deposits mean many people will be stuck in the rental trap for the foreseeable. Consider an "average" £250k house (unrealistically cheap for London) - even if you saved up the £25k for a 10% deposit, you'd be looking at taking out a mortgage of £225k. A quick check at the
MSE mortgage calculator says that in order to qualify for this, two people would both need to be earning £50kpa (something that plenty of people are nowhere near earning) and that's right at the maximum end of the borrowing range (and thus incurring higher interest). I know vanishingly few people earning over £50kpa. Even with large drops in the capital requirements for mortgages (something which comes with its own dangers, but that's another story) most people still won't be able to achieve that sort of earning.
Prices simply need to come down to prices that ordinary people can afford (but that's probably going to mean a massive crash needs to happen before it does). Until that happens the UK housing market is largely funnelling more and more money from the have-nots to the haves both in terms of rents to private landlords and interest on ever-more hugely inflated mortgages.