Irish Sea

The Irish Coast Guard said the missing man is believed to have gone overboard from a UK registered yacht 16 nautical miles south of Dunmore East in the Irish Sea.

Speaking ahead of the conference, Allister said there would be an "upbeat spirit", however, he will warn that unionism will not recover "unless and until" the Irish Sea border is fully removed.

In the Irish Sea, the cost pressures of keeping the triple lock are similarly intimidating politicians on the Isle of Man.

Therefore some travel disruption is possible, especially to Irish Sea ferry crossings.

The flipside is that goods arriving from elsewhere in the UK are subject to controls and checks—what is known as the Irish Sea border.