Around 60 firefighters and officers have been at the scene of a fire in a block of flats in Crawford Place, Marylebone late last night and early this morning.
A corridor on the eighth floor of the block and part of the lift shaft and lift lobby area was alight.
London Fire Brigade crews helped residents to evacuate the building.
London Ambulance Service attended, but there have been no injuries.
Station Manager, Matthew Burrows said;
The communal areas on the eighth floor has been badly damaged but thankfully the fire doors did their job and helped stop the fire spreading into flats. Crews evacuated around 50 residents and they waited in a local fast food restaurant. We are hopeful that some will be able to return to their flats shortly.
Eight fire engines and an aerial ladder platform from North Kensington, Soho, Paddington, West Hampstead and Kentish Town fire stations are at the scene.
The Brigade was called at 10.15 pm and the fire was under control by around half past midnight.
The British Red Cross helped Westminster Council accommodate up to 60 residents made temporarily homeless by the fire at the Seymour Leisure Centre.
The cause of the fire is not known at this stage.