The youth charity Get Connected has launched an emergency appeal after its offices in central London were flooded with sewage.
The charity said that its helpline centre in central London had been extensively damaged by the flood, which occurred over the weekend.
A spokeswoman for the charity said that the main waste pipe had been blocked, causing sewage to flood out from the toilets and leaving the entire three-floor building unusable.
She said that the charity had lost the use of its helpline centre, which occupied the basement, and was concerned about how much its server might have been damaged. It had also lost training materials, she said.
The spokeswoman said the offices were unsafe to enter because of the sewage and fears for the integrity of the ceilings, which had collapsed in some places.
It could be at least a month before the charity’s staff and volunteers were able to return to the building, she said.
The 11 staff and up to nine volunteers who are usually based at the helpline offices are providing a reduced helpline service either remotely or from the charity’s other offices in Soho, where its back-office staff are housed.
The contact centre provides support to more than 250,000 children and young people a year with such services as telephone counselling, the charity said.
It hopes that the emergency appeal will bring in funds to replace damaged PCs and training materials, because it is uncertain how long the insurance claim will take.