Confirming there will be no impact on operations, Major General Paul Griffiths, the director of Army personnel, said: “The British Army’s culture is built upon strong values, high standards and a sense of belonging to an effective fighting force.

“Just like any other professional organisation, we are continually striving to build stronger and more effective teams. On 8th February, the Army will stop non-essential tasks and really focus on developing the ideas and changes we all want to see in our service, in order to help make it the best possible place to build a career.”

How ‘Operation Teamwork’ will take shape

The five-part training package will be introduced by an address from Sir Mark after which a series of vignettes, good and bad, will be used to prompt discussion about culture and what is appropriate in the modern Armed Forces.

Nicknamed Operation Teamwork, the training day is understood to be the first part of a new drive by Army commanders to expunge outdated thinking and behaviour.

The effort comes after senior officers, including Sir Mark, were summoned last year by an “exasperated” Ben Wallace, the Defence Secretary, to address a series of assaults, bullying and allowance fraud.

It was the first time that the Army Board, the senior management committee of the Army which normally meets twice a year for routine business, had been directed to present itself for such a reason.

The move comes in the wake of a Defence sub-committee report published last year – led by Sarah Atherton, the Conservative MP for Wrexham – that said 64 per cent of female veterans and 58 per cent of women currently serving experienced bullying, harassment or discrimination during their careers.

‘Virtue-signalling exercise’

Colonel Richard Kemp, the former head of British forces in Afghanistan, criticised the plan, telling The Sun it was a “navel-gazing and virtue-signalling exercise”.

It came as Boris Johnson visited Kyiv on Tuesday amid ratcheting tensions with Russia, which has stationed north of 127,000 troops on the Ukrainian border.

The Prime Minister on Saturday offered Nato an additional 900 troops plus a battery of deep fire rocket artillery to be deployed to Estonia.

The current battle group, which was due to rotate out, will remain in place, bringing the British contingent there to more than 1,800 troops.