I'd really reccomend Dmitry's apartment: it is very close to the bus station (with different bus lines to take) and 15 minutes walking from the tube.
Dmitry was not there when we arrived but did everything to make us feel at home and it was very easy to communicate with him.
The house is big enough for four people and it is well equipped (we could use the kitchen to cook insted of eating out every evening).
Bars and restaurants very close and also supermarkets.
Thanks Dmitry for welcoming us!