A house awaiting development was ablaze last night as dozens of firefighters fought to save it.

The fire service was called to the terraced property – in Elsworthy Rise, Primrose Hill – at 12.15am and needed three hours to stop the burning.

It took 35 firefighters to stop the fire, with watch manager Dave Waters stressing the operation was “technically difficult”.

He said: “Not only was thick black smoke pouring from the building but the floor had partially collapsed.

“This house was empty and awaiting redevelopment and so firefighters had to cut through metal security grills before they could access the fire.”

He added: “However, crews managed to stop the fire spreading to neighbouring properties.”

Three floors of the building were damaged in the blaze, which needed the help of crews from Kentish Town, West Hampstead, Euston and Paddington to extinguish.

The cause is being investigated.