For 5 nights i would advise following Eppings advice. Serviced apartment.5 nights.
Mid range budget.... not the cheapest but not the most expensive. £600? £800? Dunno really, just want somewhere nice. Will check out Park Plazas, cheers
We used one last summer, near London Bridge. 3 bed flat. Was great. Can't recall the name (which means i am not helping you at all i realise). I will ask the gaffer and revert.