You could try www.HolidayRentalsLondon.com

We rented from them twice short-term when we were relocating from abroad and househunting in Balham/Wandsworth Common. The flats are really well-furnished and clean and Mark and Julie who run the letting service manage them really well, sorting any problems out asap. I think you get significant discount if you are letting for more than a few weeks.

Good luck and hope you get back into your home as soon as possible

Hi
Does anyone know of any accommodation that might be available from the beginning of April for 2-3 month for me, my husband and my son who is currently 5 month old? We had a major flood at Christmas and our house is out of action until July possibly and we can only stay at our current temporary accommodation until the end of March. Any help would be much appreciated! Thanks, Gemma