Jonny Bairstow headbutted Cameron Bancroft outside a nightclub

Questions first raised after star all-rounder Ben Stokes was taken into police custody for a late-night brawl in Bristol in September.

Australia Test squad: Steve Smith (c), David Warner (vc), Cameron Bancroft, Usman Khawaja, Peter Handscomb, Shaun Marsh, Tim Paine (wk), Mitchell Starc, Pat Cummins, Nathan Lyon, Josh Hazlewood, Jackson Bird, Chadd Sayers. "Both Bancroft's group and the England players continued drinking together at the Avenue bar in Perth".

The England and Wales Cricket Board is investigating reports English batsman Jonny Bairstow headbutted Australian batsman Cameron Bancroft in Perth earlier this month.

He plays county cricket for Yorkshire, and made his England Test debut as against West Indies in May 2012.

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Sportsmail understands that Bairstow told management, including team director Andrew Strauss, that he had became involved in light-hearted joshing with Bancroft during a gathering of England and local Western Australia players.

European Central Bank on Sunday released a statement after discussions with their wicketkeeper-batsman in which they came close to exonerating Bairstow while adding that they will conclude their investigations after the first Test.

The ECB said there was no report of any incident from the venue, security or police and no injury reported.

The Bairstow incident is potentially another major setback for an England side that is nearly certain to head to Adelaide one down in the five-match series.

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The ECB have been made aware of the allegations and are conducting their inquiries while Bairstow is playing in the First Ashes Test against Australia in Brisbane.

Bairstow, meanwhile, was one of three players who were fined by the European Central Bank last month and accepted formal written warnings for "unprofessional conduct - unrelated to the investigations into Ben Stokes and Alex Hales".

There is an acceptance within the European Central Bank that they can not keep the players confined to hotel rooms on tours that last for weeks on end but the last thing they needed was more accusations that any of their players had done anything wrong.

It is understood that Bancroft, who at that stage had not been selected for the Australian team, did not retaliate.

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