Gabriel provided me his room with very short notice of mine because the initially booked one got cancelled, so I'm very grateful for that.
The bed was big and comfortable. But that was the only nice point about the flat. The rest was extremely dirty and I didn't enjoy staying there. The bathroom itself was nasty and disgusting and smelled like something I'd expect in a wet cave. There wasn't even toilet paper available for the first two days.
Regarding the huge amount of Airbnbs in London I wouldn't go there again and choose another accommodation for a future trip instead.