Earlier quoted context omitted.
wow... that rule of thumb makes it virtually impossible to buy-to-let in my neighbourhood. a "Cheap" 2-bed apartment is £150,000 and MAX rent for that kind of place here would peg somewhere about £600, but definitely nowhere near £1500. Even at a liquidation auction or lowballing a desperate seller, there's no way to buy anything habitable for under 60K
I do BTL in the UK. For our market, look at 1% of the mortgage . So, if you put down a 50% deposit on a £150k place, you'd want rent of £750. Actually, it depends very much on your circumstances, attitude to risk, how much you're happy to pay in agency fees etc. Also, in the UK, we don't tend to have 30 year mortgages, which makes predicting a stable price very tricky. The UK also has vastly different tax rates - and…
I am completely ignorant about UK real estate, so I might be missing something obvious.