Andy Burnham has become the UK's fifth prime minster in four years following the departure of Sir Keir Starmer.
Jeffrey Donaldson, who has been convicted of 18 counts of sex abuse, was a member of the UUP from 1985 until 2003.
Northern Ireland politicians react to the resignation of Keir Starmer as leader of the Labour Party and prime minister.
In the long, inglorious history of political self-destruction the Ulster Unionist Party record takes some beating.
BBC News NI looks at the messy split between current UUP Leader Jon Burrows and former leader, Doug Beattie.
A petition of concern would need at least four UUP signatures in order to pass, as backing from 25 DUP MLAs and one TUV MLA would not meet the threshold.
Burrows was speaking for the first time since Doug Beattie quit the party and launched a scathing attack.
Doug Beattie recently quit the Ulster Unionists and then launched a blistering attack on his former party.
Doug Beattie was speaking after he quit the Ulster Unionist Party, which he used to lead, on Sunday.
