Quiz question: Why are these people officially better than the rest of us?

Mr Frank Doran, Aberdeen North, Labour
Janet Anderson, Rossendale & Darwen, Labour
Rt Hon Mr Nicholas Brown, Newcastle upon TyneEast and Wallsend, Labour
Mr Simon Burns, West Chelmsford, Conservative
Mr Christopher Chope, Christchurch, Conservative
Derek Conway, Old Bexley & Sidcup, Conservative
Rt Hon Frank Dobson, Holborn & St Pancras, Labour
Mr Brian H Donohoe, Central Ayrshire, Labour
Mr Neil Gerrard, Walthamstow, Labour
Helen Jones, Warrington North, Labour
Mr Kevan Jones, North Durham, Labour
Rt Hon Greg Knight, East Yorkshire, Conservative
David Lepper, Brighton, Pavilion, Labour
Mr John Randall, Uxbridge, Conservative
John Thurso, Caithness, Sutherland and Easter Ross, Liberal Democrats
Pete Wishart, Perth and North Perthshire, Scottish National