Fair play, 500 is a very good rate, even for a studio. Depends on where you live obviously but I was paying 800 in Salford and that was the cheapest I could find without picking somewhere that was falling apart or damp. All the Media City folks drove the prices up like crazy.
I got a phone call from the landlord one day saying the rent was going up by £200 a month. I said “Well then I’m moving”. “Well you’re a good tenant, what can you afford?” “Another £30 a month”. “Deal”. Landlords are just profiteering a lot of the time looking for a quick win from somebody who won’t challenge them. I moved out 6 months later.
London is a whole other story. I was paying 1400 pcm for a shoebox. And that didn’t include any other bills. 21k wouldn’t go far there, can’t imagine anybody living alone there on less than 40k. Want to live outside the city? Well then the trains will cost you 10k a year. I work with young consultants earning 60k+, none of them live alone. Think that says it all.