Okay, I have read most of the posts and most people seem to be of the view that contributing to a pension is a better idea than using btl property as a pension.
I have contributed to pensions in the past when my employer was also contributing, so I am not against them as such, but would like to point out a couple of things.
If you buy a rental property you only have to contribute the deposit, the rest you borrow, so in effect you are making money with someone else money, not your savings. Let me give an example, and this is realistic because I have been doing it for many years. The figures are simplified for ease. So, you buy a property for £100,000. Your money is used for the £25,000 deposit, you borrow the remaining £75,000 at 2.5%. You get a return of £7,000 / year and pay £1875 on the interest of the mortgage (2.5% of £75,000). So actually your return is £5,125 per year once you have taken the mortgage costs off. But, that £5,125 is return on your £25,000 investment, which is a 20.5% return on investment! Do you get that on your pension? Also of course there are other costs, but there is also capital growth on the property when the prices go up. So to my mind it is a really good investment. You are using someone elses money (the banks) to boost your savings.
Second reason is when you and your partner die, who gets your pension? With property investment you can pass it on to your children.
So, in my view btl beats pensions every time.