Momentum, the Jeremy Corbyn supporters’ group, was last night accused of “laundering money” through a front organisation to get round campaign rules and spend up to three times more than the legal limit at last year’s general election.

As a “non-party campaigner”, Momentum was limited to spending £39,000 directed at getting voters to support Labour before the poll. In its official return to the Electoral Commission, Momentum declares spending of £38,743.

However, The Sunday Times has established that pro-Labour campaign spending of a further £60,590 was declared by an organisation called The World Transformed, which registered with the Electoral Commission nine days after the election was called.

The World Transformed claims to be a separate body and gives its address as a terraced house in