Disgraced Barnet councillor Brian Coleman faces a “trial” by his Tory peers as they attempt to permanently expel him from the Conservative Party.

Officials from the party’s Chipping Barnet branch, at which the former mayor registers his membership, last night met to lay out the expulsion process, which is expected to take several weeks.

The constituency’s executive council, made up of up to 50 councillors and senior members, will now meet in the next three weeks to reconsider the former GLA member’s membership in light of his recent criminal conviction.

The former London Fire Authority head was fined earlier this month after he pleaded guilty to physically assaulting mother-of-two Helen Michael in North Finchley High Road in September.

The café owner was attacked and injured by the politician as she took pictures of his illegally parked car.

Council leader Richard Cornelius, head of the Barnet Conservatives, has failed to speak publicly on the actions of his former cabinet member since the guilty plea almost two weeks ago.

The extraordinary meeting of the executive council will be chaired by an independent member of the Conservative Party, and Mr Coleman will be invited to make representations to fight his case.

The 50-strong committee will then vote on whether to permanently revoke his membership.

Fiona Bulmer, chairman of the Chipping Barnet Conservatives’ Association, said the meeting will take place in the next three weeks, once a date with the chairman can be confirmed.

The executive council usually meets once every two months but officials were forced to call the extraordinary meeting following Councillor Coleman’s conviction at Uxbridge Magistrates’ Court.

Ms Bulmer said: “It is certainly the first time I have seen anything like this in the 14 years I have been involved in the association. This sort of thing is not common, though it is not unprecedented. It is a sort of trial – he will have his say and the association will have theirs.”

Barnet’s Conservative Association has been criticised by opposition members for “dragging its heels” on the issue, but Ms Bulmer says she is bound by more than 16 pages of rules and regulations, which take time to implement.

She said: “We have rules set down by the national party’s constitution and this is a serious matter which has to be dealt with properly.

“We have to follow due process and give people proper notice meetings and ensure they can attend, so it does take time.”