Police investigating an allegation of the burning of ballots in the Peterborough by-election have concluded that no offences were committed.

Cambridgeshire Police previously said no crimes were revealed in respect of one allegation of bribery and two relating to postal votes.

The force said on Wednesday that it had concluded its investigation into an allegation of the burning of ballots, with no crime found to be committed.

The investigation into a fifth allegation, of a breach of the privacy of the vote, is continuing.

The Brexit Party claimed last month that vote-rigging may have played a role in Labour's wafer-thin victory in the by-election.

The Labour Party rubbished these claims as a "desperate attempt" to excuse a defeat, describing the allegations as "nonsense".

Nigel Farage's party called, during a previous press conference, for an inquiry into claims of impropriety.

The Brexit Party ended up in second place in the June 6 poll when Lisa Forbes won by 683 votes.

Chairman Richard Tice said there had been numerous "rumours", including claims of "vote-rigging", and alleged a "convicted electoral fraudster" had acted as an election agent for the Labour Party.

The party focused criticism on the postal vote system, with leader Mr Farage calling for an overhaul.

A Labour spokeswoman defended the party's campaign as having "fully complied" with laws and regulations.

Addressing the claims, she said: "This is nonsense. This person was not an agent for the Labour Party and was not involved in the running of Labour's campaign in any way.

"This is a desperate attempt by the Brexit Party to make excuses for their defeat. Labour won the Peterborough by-election fairly and squarely."