A letter offering witness support to a victim of anti-social behaviour was accidentally sent to the difficult neighbours he had complained about.

The note – which contained the father-of-two’s name and address – was wrongly posted to the people being investigated by housing officers.

He has now been left fearing what they might do now they know who he is, and council housing body Homes for Islington (HfI) has had to apologise for the mix-up.

The resident, who asked not to be identified, said: “We hear parties and fighting all the time and have phoned the police three times.

“They are unsavoury characters and they know where we live now. We’re worried there could be repercussions.”

The mistake came to light when a housing officer asked if he had received a letter from the witness protection services.

They checked the address and realised it had gone to the neighbours.

A spokesman for HfI said: “We do not disclose a complainant’s details to other residents when dealing with cases of anti-social behaviour.

“Unfortunately in this case a standard letter, outlining the support available when you report ASB, was sent to the wrong address.

“It did not contain any specific details of the complaint, but it was a mistake and we have apologised unreservedly to the resident.

“We are taking action to resolve the original complaint and will actively support our residents against anti-social behaviour.”