In answer to a couple of the questions;
@NewAccount270219, the return depends on the type of house and area you rent out. For example our house we live in, which is a nice detached family house in a lovely area would probably only get around a 2% return. Totally not worth it.
@Alsohuman, it really does add up. Yes, you pay tax on rental income, but you pay tax on any income, so the 20% return becomes 16% when you take the tax off, still better than a pension? So you then invest the 16% in either the deposit for the next one, or paying off the mortgage. And you have to bear in mind I get access to that income now, or at any age I chose with no restriction. I will be able to retire at 50. You also doubt the 7% return, but I get it. As I said, it depends on the type of house and the area you buy in. I also agree with you if your employer is contributing as well as you, then absolutely do that, I have in the past, but I am self-employed now and the only person contributing to a pension would be me, so I believe property is better. With regards to capital gains tax, well you only pay when you sell, and if you have large gains from many years yes you will pay, but remember, you only pay tax on money you get, so you only pay large amounts of tax if your gain is large..... Pension income is taxed too.
@rainandshine52, yes inheritance tax is an issue, but I can give some property to my children whilst I am still alive hopefully to avoid it to some extent, but in any case I would rather pass on 60% of my savings (less the 40% tax) than the lesser amount from a pension pot, which is likely to be subject to tax anyway.
@Ali86 with regard to repairs, yes, of course they need them, but I only buy almost new property, which needs minimal maintenance for quite a lot of years.