The trade unions and the North Down MP, Lady Sylvia Hermon, worried about the potential cost to public services.

BBC: Corporation tax move 'tough blow' for Stormont

That would pose interesting questions about how much longer the DUP's non-aggression pact with Lady Sylvia Hermon might be sustained.

BBC: Peter Robinson takes the grandstand view

Meanwhile, Lady Sylvia Herman, the constituency association chairwoman said she understood Mr Weir would have 28 days to appeal the ruling.

BBC: Weir to fight suspension

The Corporation Tax campaign united the Stormont parties, despite opposition from the trade unions and the North Down MP Lady Sylvia Hermon.

BBC: What Theresa Villiers will soon discover

Mr Cameron earlier admitted he still needed to convince the only UUP MP, Lady Sylvia Hermon, of the benefits of closer ties between the two parties.

BBC: Pact will 'empower NI electorate'

But if his party's two remaining seats are North Down, held by Lady Sylvia Hermon, and South Antrim, held by David Burnside, he may not have much choice.

ECONOMIST: Northern Ireland: Impending doom | The

On Friday, Lady Sylvia Hermon, who chairs the party's North Down constituency association, said she did not want to comment until she had been officially informed of the disciplinary committee's decision.

BBC: Weir supporters to fight suspension