Peter Mandelson has told parliamentary officials he intends to retire from the Lords from tomorrow, APA reports citing BBC.
He has been on a leave of absence from the upper chamber.
The announcement was made at the start of business by the new Lord Speaker, Lord Forsyth.
He tells peers: "My Lords, given the public interest and for the convenience of the House, I have decided to inform the House that the Clerk of the Parliaments has today received notification from Lord Mandelson of his intention to retire from the House effective from 4 February."