If you are travelling alone then James place is the place to stay in London. Quiet neighborhood (if you are runner then pack your running shoes and track suit - it is made for morning/evening runs), shops/ pharmarcy/places to eat - nearby. Easy to get to London's center or airport with public transport. Zoo - 15min walk through the St.Regents park.
James is really amazing host, not everybody takes care of his travelers as him (towels, hair blower, even the hot water bottle), tips about how to travel in London's messy public transport system.