Very nice neigbourhood!
We travelled with a power wheelchair and the apartment worked well. We got a key for the car gate, and the janitor put out cones to prevent cars from parking in front of the inner gate. The door to the apartment is narrow, but the Permobil k300 got in. If the wheelchair user needs help in bathrooms, they would be too small. Also in the largest bathroom you need to climb into a tub to take a bath. In the smaller there is a cabinet that you need to climb into. For us it worked fine.
The local tube station is not wheelchair accessible, but all buses are! We used Google maps to get around. Just select accessibility in settings. Lots of buses in all directions. Bus drivers are helpful.
The best part was when we went to close by Kensington gardens with unsalted nuts, and the exotic birds would sit on our hands and head. We loved it!