I very much enjoyed my stay with Paul. Paul was very friendly and answered all my questions. The location is a within a short distance from Paddington Station. The building is a converted Georgian townhouse and has a small elevator that fits one person at a time. The apartment is sparkling clean. Walking here from Paddington station, you will pass a little grocery store where you can purchase some personal use amenities such as soap and shampoo as well as snacks. I was there in early July and the temperature was 85 degrees. The bright living room may be quite warm but the bedroom faces away from the sun and is noticeably cooler. Slept very well on the full/queen sized bed. It was comfortably firm with a thick comforter.
The Heathrow Express takes only 15 minutes (one stop) from the airport to Paddington Station. The Bakerloo underground (subway) station is here too. The beginning of the Hop-on hop-off bus's blue route is across the street in front of the Oliver Steak House. If you go there for the first bus at 7:28 in the morning you can get the best seat in front on the top deck. I did and it took 5 1/2 hours for a complete circuit without getting off for any of the sights. Tickets are sold at any of the souvenir stores. Many restaurants in the vicinity.
My trip was made so much easier because of the convenient location of Paul's apartment. I heartily recommend it and will return on my next trip to London.