I think #Piggate has done for David Cameron. He wont go tomorrow but he will not be prime minister this time next year.
Even if its just portrayed as an early hand over (remember he said this was his last term) it will be about the Pig as surely as Blair was finished by Iraq, Thatcher by Poll tax and Europe and MacMillan by the Profumo affair.
Obviously this is probably the least worst thing he’s done. But it makes him a laughing stock and undermines his attempt to appear ‘normal’ or sensible opposite Jeremy Corbyn. It reminds people the ruling class are another country and they do things differently there.
He could perhaps save himself for a while by coming out now and publicly owning this as folly of youth and asking for people to forgive him etc. But the longer he waits the weaker the impact of that will be. I think he has already missed his chance to angrily deny it and style it out.
It clearly helps Corbyn without him even having to mention it. Though in some ways George Osborne as PM is a more serious adversary (though not as good on TV as Cameron).
Its funny as fuck but not as important as fighting the anti trade union bill and renewing the Labour movement. Piggate and the story threat of a Coup against Corbyn if labour are elected makes both tasks slightly easier.