Micheal Martin was due to deliver a keynote address at the Dublin Belfast Economic Corridor Summit at the International Convention Centre in Belfast.

Speaker Edwin Poots said some MLAs have ‘a very loose interpretation of smart’ when it comes of their attire.

The NI Secretary wrote to the Stormont Speaker Edwin Poots on Monday to inform him of the decision.

Members are likely to vote on a majority basis to continue with the contentious rules and regulations that govern trade between the region and GB.

The comments were made by the DUP Communities Minister to the Alliance Party’s Kate Nicholl during a debate on childcare funding.

Edwin Poots reminded MLAs of their responsibilities when issuing and returning security passes for Parliament Buildings.

No injuries have been reported to police officers

DUP leader Sir Jeffrey Donaldson will brief members of his party’s 130-strong executive on UK government proposals on post-Brexit trading arrangements

Sinn Fein’s call came ahead of a crunch meeting of the DUP’s executive on Monday evening.

South Belfast MLA Edwin Poots denounced those in the wider unionist movement for criticising a deal with the Government which has not concluded.