London, England - Organisers of a memorial service to remember murder victims say its future is in doubt because of concerns it may exclude non-Christians.
The service at Trafalgar Square's St Martin-in-the-Fields church attracts hundreds of bereaved people each year.
But the Home Office, which provides £2,000 funding, has asked for proof it reaches "all parts of the community".
Organiser Sandra Sullivan, 60, accused officials of trying to bully her into changing venues.
Her daughter Kate, 23, was stabbed to death in 1992, and she and her late husband funded the event themselves when it began 11 years ago.
Three years ago the then Home Secretary David Blunkett agreed to provide £2,000 annually, saying it helped victims of crime.
The grant is up for review after this year's event - due to be held on 10 December - and civil servants have written to organisers with their concerns.
According to the Daily Mail, one official wrote: "I appreciate the service is a source of great comfort for those who attend.
"I am however concerned that this service could be seen as a Christian service and could therefore exclude parts of the community that would benefit from attending a memorial service."
He went on to ask for any "ideas you have on improving the multi-faith aspect of the service, such as possible alternatives to holding the service in a church".
Mrs Sullivan from Kingston, south-west London, told the BBC News website: "I don't care whether they are black, white, pink or yellow, if you have lost that someone, a friend or relative, then you will want to come to this service.
"People don't come for the religious aspect, it's not a service, everybody takes part and lights a candle.
"I believe it should be in a church because it's spiritual and it's the only way I see my daughter. It's a great comfort for everyone."
A Home Office spokesman said a decision had not been made on the grant, which was up for review because it was agreed for four years up to 2005/6.