AVON and Somerset Police has submitted a file to the Crown Prosecution Service (CPS) relating to the general election expenses in 2015.

The revelation comes as a second Tory MP revealed he had been quizzed by officers.

The force is one of 11 who have submitted files, a spokesman said.

A spokesperson for Avon and Somerset Police said: "We have completed our enquiries and have now submitted the files to the CPS.

"We cannot name the MPs concerned."

The probe into the Conservative Party's battle bus campaign in the 2015 contest is examining whether strict spending limits in target seats were breached.

Tory MP Will Quince said he had been told by Essex Police he faced no further action after voluntarily attending an interview under caution last January.

A CPS spokesman said it had received files from: Avon & Somerset, Cumbria, Derbyshire, Devon & Cornwall, Gloucestershire, Greater Manchester, Lincolnshire, the Metropolitan Police, Northamptonshire, Nottinghamshire and West Yorkshire police.

The disclosure follows reports that Craig Mackinlay, who fought off a challenge from former Ukip leader Nigel Farage to hold Thanet South for the Tories, had been questioned for six hours last week by Kent Police.

The latest moves come amid growing anger among Conservative MPs still facing investigation by the police and the Electoral Commission in relation to spending during the 2015 election.

In his statement, Mr Quince acknowledged that once a formal complaint had been made in June 2016, police had had a duty to carry out a thorough investigation.

However, he said that the inquiry has caused stress to his staff and family and he had suffered "reputational damage" while it was carried out.

"Moving on to the allegation itself, I consider this to have been vexatious and politically motivated," he said.

"Politics is not a game. I would ask those individuals to think about the cost of this investigation, the important work those police officers could have instead been doing over this lengthy period, the stress that it put me, my family and my team under and the reputational damage to me personally."

Other MPs have directed their anger at Conservative Campaign Headquarters complaining that they had been cut adrift by the party's high command even though the complaints relate to the busing of activists to campaign in key marginal seats which was organised centrally.

The allegations centre on whether the "battle bus" tour should have been recorded as counting towards individual candidates' spending limits, rather than as part of the larger national spending return.

In a leaked email to Conservative Party chairman Sir Patrick McLoughlin, Lincoln MP Karl McCartney complained they felt "completely cast adrift" and "left to fend for themselves".

In a statement, Mr McCartney said he had made clear his "forthright views" privately to a number of senior party figures on behalf of backbenchers.