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In addition to the politicians on the published list of guests for the Royal Wedding, I have learned that there are also several other politicians on the much longer unpublished list of the bride and groom's personal guests.

Two are MPs, both are Conservatives. They are Nicholas Soames a long-standing friend of Prince Charles, and Rory Stewart, a former tutor to Prince William.

And there is also the former Labour Welsh Secretary Lord (John) Morris, who was invited through being a knight of the garter.

Two other knights of the garter who are former Tory ministers, Lord Carrington and Lord (Richard) Luce, have both been invited, but I've not yet discovered if they're going.

So by my reckoning the party tally of definite attenders is 12 Conservative politicians - Cameron, Osborne, Hague, May, Clarke, Hunt, Alex Fergusson (presiding officer of the Scottish Parliament), Boris Johnson, Judith Warner (Lord Mayor of Westminster), Soames and Stewart. There's just one Lib Dem - Nick Clegg. And three Labour - Ed Miliband, Carwyn Jones, the First Minister of Wales, and Lord Morris.

At a pinch you could say it's four Labour if you include Sally Bercow, wife of the Commons Speaker (and the subject, incidentally, among Conservative MPs as to whether she will tweet "something inappropriate" from the Abbey).

Or perhaps five Labour people if you include John Bercow himself, as one senior Labour figure mischievously suggests I should.