Look familiar?

Sergeant Keble, Junior Commissioner of the Great Seal 1649 -54. Oil painting by Robert Walker. Copyright Parliamentary Art Collection. WOA 2710 www.parliament.uk/art

There are so many portraits of parliamentary titans of the past on the walls of the Palace of Westminster, that MPs and Peers almost tune them out.

But there is something about this picture of Richard Keble - the Keeper of the Great Seal under Cromwell - that has recently led to a few MPs performing double takes when they pass it in the Smoking Room.

Has the Parliamentarian and Judge, who was banned from public office after the Restoration and the return of King Charles II, been reincarnated to lead the Labour Party?