Lea's apartment was very nice.
It is located very close on time to the center of London (Westminster, Piccadilly...): 2 underground lines, Central Line from the Stepney Green station, and the new fully automated Elizabeth Line from the Whitechapel station, and you are 20 to 30 minutes (including the walking time) to the center.
The flat is also very well equipped, and the neighborhood is very calm. For us this is the perfect location to stay in London.
We would definitely come back if we needed to stay again in London.