Marcin's apartment was a 9 min walk the train station that serves the District line and goes directly to Heathrow, which is super convenient. You can also take it the other way into city centre.
The neighborhood is residential, I arrived there at 11p and felt very safe walking from the train station.
The apartment itself is clean, well equipped and a great spot to rest your head after walking/touring London the entire day. Bonus points for the bakery right below.