I'll temper this by saying that "budget" hotel market in London is horrible, and somehow we have to accept 3rd world accommodations at insane prices. DO NOT BOOK THIS HOTEL IN SUMMER. It was over 40 degrees in my room day and night, even with the window open and fan on, even when it cooled down outside, the room would not cool. I was terribly ill from it and couldn't sleep. It's not a sufficient excuse that these buildings are old. they need to get some kind of extraction fans or AC that will allow cool air into the rooms. Beyond this, the wifi is compeltely unreliable, it will frequently disconnect from the internet, or just lose bandwidth and your connection to whatever you're doing will timeout. I was unable to even stay logged into my work email. or finish simple tasks like booking hotels. Forget trying to watch Youtube or anything like that. Staff just said to connect to an unsecured public network, which didn't work at all. For the price, this place is just not meeting the mark.
That said, if it weren't so hot, and you don't care about internet access, the bed was comfortable, the small, simple room got the job done, and the shower was adequate. Probably ok in winter.