Sir Richard Henriques, who authored a report for Scotland Yard into the failings of the VIP child abuse investigation, said police should use the term “complainant”.

Carl Beech, 51, who was jailed for 18 years last month after fabricating claims about sexual abuse and murder by politicians and others was treated as a victim as soon as he made the allegations, Sir Richard said.

“People who come forward should be referred to as complainants, not victims,” he said.

“There should be no presumption that the complaint is true … then there is a presumption that the person accused is guilty.

“That flies in the face of the presumption of innocence. That is at the very heart of what went wrong in this case.”

The Metropolitan Police, however, said it continued to support the use of ‘victim’, adding: “This does not confer any judgment on the allegations they make, which will always be investigated impartially and with an open mind.”