LABOUR London mayor hopeful David Lammy demanded an inquiry yesterday into the party’s electoral process after claims that one in five London voters did not receive their ballot papers surfaced.

The Tottenham MP said 11th-hour campaign calls revealed the scale of the problem.

Mr Lammy said: “I suspect now that this is closed there will be a clamour of people very, very upset that despite being a member or indeed someone who signed up and paid their £3 and hasn’t been excluded because they do not share the values of the Labour Party, for a few of those people they have not been able to vote.”

The ballot boxes closed at noon yesterday, after a last-minute attempt from the party’s organisers to send new voting cards to those who had complained.

More than 4,000 Labour members and supporters nationally were rejected from voting in the leadership elections in a process that was branded by many as a “purge” of those who wanted to vote for Jeremy Corbyn.