Lord Sugar has expressed ‘frustration’ at Lord Lloyd Webber appearing on Over the Rainbow while The Apprentice was delayed to avoid a General Election clash.

Lord Sugar took up a seat in the House of Lords last year as the Labour Government’s enterprise tsar, raising concerns about possible impartiality risks.

His 2010 Apprentice shows have avoided coinciding with the political campaign.

Speaking at the launch of his new Junior Apprentice show, Lord Sugar said the general public never understood what difference it made whether he was on TV or not.

He said: “It was a nonsense, really, right from the very beginning.”

Lord Sugar said: “We’ve seen (Lord) Lloyd Webber on TV in the middle of the election, as you saw the other day with his television programme on Saturday.

“We saw him in The Sun newspaper last week saying that he backs Mr Cameron and all that stuff. So you can imagine how frustrated people like me are.”

The BBC Trust’s Editorial Standards Committee found in July that the entrepreneur’s role did not lead to a conflict of interest with his job on The Apprentice as long as safeguards put in place by the executive were strictly observed.

A statement from the BBC has said of Lord Lloyd Webber: “We advise prominent figures working with us to avoid intervening in the political debate at times like this.

“However, he is at liberty to express his opinions, which he has made no secret of in the past.”