Alan was a fantastic host. It's a very interesting house on its own and he did a great job orienting us to it. Nothing really to suggest to improve. I guess if someone in your group had mobility issues (the "lowest" bedroom is on the 2nd floor (two above ground). The rooms are comfortably sized to generously sized. From the third floor you can even see the Palace of Westminster peak over the houses.

The location is quite convenient, especially with multiple bus routes stopping nearly right in front. In my opinion, one of your first activities should be the purchase of an Oyster card (at worst walking a few blocks to Lambeth North tube station) and then the bus is both inexpensive and convenient.