Determined to give the Labour Party his all in the election, Tony Blair went to Sedgefield (his old constituency) and then flew all the way down to London again. Since then, the former PM has been to….Harrow. To a hospital in Harrow, where he rolled up his sleeves and got stuck in. Well, just the one sleeve actually – so a nurse could take his blood pressure. Then Tony went back to Pimlico. Where (as far as one can tell from the Labour websites) he remained until yesterday, when he toddled around a few London constituencies for a bit.

Anthony Charles Lynton Blair is supporting Labour in this campaign in pretty much the way he has tackled work on his autobiography (a year late) and as a Middle East peace envoy (attendance rate so far, 18%). For Labour, this is probably a good thing whichever way you look at it. So many people loathe the bloke now, he was always more likely to do more harm than good; and for those who still admire him, he just acts as a reminder of how awful Gordon is.

Too little too late scarcely does Blair’s contribution justice, but it does beg the question ‘Is any of this dashing around going to make much difference now?’ For Mr Brown it did, because he tripped over the forbidding form of Mrs Bigot of Rochdale, and was thus consigned to history’s attic. For Clegg, it has helped build up a sense of momentum; and for Cameron, it has proved that an old Etonian can visit places in Lancashire without the need for smelling salts.

But this isn’t really about ‘fighting for every vote’ – it’s about getting in front of cameras and into news bulletins. Without cameras, nobody would’ve known about Gillian Duffy. Without cameras, there’d be no point in Dave going to Bromsgrove and Nick going to Sheffield. Without cameras, none of them would’ve been in Bristol or Manchester for the debates. And without cameras at those debates, the LibDems would be on the same 15% they’ve been on for the last twenty years.

The idea that a handful of Westminster celebs going on the stump can mathematically make any difference at all to the result is beyond silly. But where Cameron has got it right is in being seen to pull out all the stops for a majority – rather than get into grubby negotiations afterwards.

Where the Cameroons per se get it wrong is in their innate ability to say something brave, and then run away from it when somebody asks “Yer what?” Having pulled a rabbit out of the hat last Monday morning, last night Dave seemed to be quietly stuffing it back up his sleeve.