A Devon and Cornwall police boss has become the force's second senior officer to quit in just over a month.

Assistant Chief Constable Caroline Winter is to take up a training post. She was being investigated following a project to cut police staff pay.

A senior police source told the BBC that it was "difficult for her to carry on" while the investigation continued.

Her announcement follows the resignation of Chief Constable Maria Wallis in July.

Ms Winter will move to Centrex, the Central Police Training and Development Authority.

The police source said attention was "inevitably" focused on Ms Winter after the early retirement of Mrs Wallace, who was also under investigation for her role in a pay review.

The force backed down over the review which Mrs Wallis authorised and which proposed cutting hundreds of civilian workers' salaries by thousands of pounds.

The force said the pay review had been designed to ensure staff were paid fairly.

Mrs Wallis stood down from her post on 26 July, a day after revelations by the BBC that senior figures in the Police Authority were calling for her resignation.

Mrs Wallis said her retirement was "the right thing to do for the people of Devon and Cornwall".

Deputy chief constable Nigel Arnold took interim charge of the force.

Devon and Cornwall Police was unavailable for comment.