The incident took place in the Long Room in the Lord's pavilion followed the controversial run-out of England's Jonny Bairstow, which was met with chants of "same old Aussies, always cheating" by the home crowd on a tense final day of the second Ashes Test.

Bairstow had ducked under a bouncing delivery which made its way through to wicketkeeper Alex Carey, before wandering out of his crease as he thought the ball was dead.

Carey threw the ball at the stumps and the run-out was given following a check - prompting claims of unsportsmanlike conduct.

Australia's players were then confronted in the pavilion as they returned to their dressing room for lunch.

Three members were subsequently suspended and now the MCC has decided to issue further sanctions.

In a letter to members, chief executive and secretary Guy Lavender confirmed one member had been expelled and two others would be suspended for four-and-a-half years and 30 months respectively.

A document outlining guidance on disciplinary penalties made it clear the misconduct in each case was serious enough to fall within the "higher end of culpability", Mr Lavender said.

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Details of the disciplinary process will remain confidential and the MCC does not intend to publish the names of the three members who had been sanctioned.

The letter added: "Although it is clear that a wider group of members were guilty of breaching the club's code of conduct on 2 July, the club's investigation has not yet been able positively to identify further individuals for onward referral to the chair of the disciplinary panel."

In a letter sent to members on 6 July, club chair, Bruce Carnegie-Brown, said the members shown on camera "brought shame" on MCC.

"I cannot downplay the impact that the behaviour of a few members has had on the perception of our club.

"Their actions hinder our efforts to promote the positive things our club does to promote and celebrate the game of cricket."