A potential employer once also wanted statements - I think 6 months' worth, and I did the same. HR pushed back but legal backed them down rather quickly. I think these people ask because most just comply without question.
WTF.
That's a crazy practice. Paystub maybe, but bank statements? My gosh.
Unrelated rant but the reason I've been looking is my current landlord has taken over 35 days to send me a renewal contract. Go figure that 10 minutes after texting him I'm going through the credit check for a new apartment he sends me the updated document.
Before I got my place there were 3 other apartments in the same complex I verbally agreed to and then agent called back to say it had been taken. Not sure if you've rented in likes of London, NY or SF before but the competition can be intense.
Look it sucks that I had to do that, in an ideal world we could have done what you said, but I valued getting the place over my reservations of handing over bank statements.
I don't think is common practise in the U.K, but I asked around and lots of people told me it is more common that the larger agencies ask for it, plus it was for an apartment in a very competitive development so I feel like it might have been a forcing function to reduce the amount of applicants but that is speculation on my part.