We had a good stay at Edmund's house. We were welcomed by his mother who was very kind and gave us a little tour of the apartment and answered our questions. She was very easily reached when we had issues with our flights and had to delay check in.
Edmunds apartment is near some very nice restaurants (particularly Pimlico Fresh 👌) and close to Victoria station making it easily accessible to the rest of London.
Overall a great stay! The apartment is just a bit smaller than I expected but I guess that's par for the course for london.