But the Taxpayers Alliance said it was time to come clean on what was spent on the production.
Jonathan Isaby, the pressure group’s chief executive, said: “People will be furious. When times are difficult and hard-pressed families are struggling with ever rising bills, can this really be a good use of taxpayers’ money?
“It is also strange that the authorities won’t reveal how much of taxpayers’ money actually went into this film.
“People expect their taxes to pay for frontline services, not to be wasted on films which go straight to DVD.”