Police have said the cost of security for Sir Elton John's civil partnership ceremony in Windsor, Berkshire, will not be met by the taxpayer.
Sir Elton John and David Furnish's ceremony will be held in Windsor
But Thames Valley Police chiefs have still refused to reveal how many extra officers will be laid on for next week's event for "operational reasons".
They have only confirmed that "high visibility patrols" will be laid on "to ensure public safety".
The cost of extra policing around the Guildhall will be met by organisers.
The ceremony takes place on 21 December in the same 17th Century venue where Prince Charles married the Duchess of Cornwall in April.
Sir Elton and his partner, David Furnish, will be among the first to take advantage of new legislation making gay civil partnerships legal in the UK.