The charity watchdog should never have granted legal charitable status to a trust that raised £176 million in two years but paid out just £55,000 in charitable donations, according to a report from a committee of MPs.

The Charity Commission's failure to stop UK-registered charity the Cup Trust abusing the law to avoid tax was "unacceptable" and could have been easily avoided through elementary checks, the Commons Public Accounts Committee said.

Chairwoman Margaret Hodge MP said: "My committee does not believe the Cup Trust ever met the legal criteria to qualify as a registered charity. Its purpose was to avoid UK tax."

The report said "it is clear the trust was set up as a tax avoidance scheme by people known to be in the business of tax avoidance".

The trust could be "the tip of an iceberg" as HMRC investigates around 300 similar schemes a year.