Apologies for not addressing the OP: I haven't a clue what Boris could usefully add to the campaign other than make it known whether he's going to make a mid-term leadership bid, regardless of Conservatives being in power.
If Gordon Brown can take over a sitting government without the electorate's intervention then why should BoJo?
Off-topic but couldn't let this pass
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youngmafbog
Spells doom for lefties like you, for those of us wishing to progress out country and have no problem with people getting on it spells quite the opposite.
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Lefties have no problem with people getting on, just so long as they don't leave everyone under them behind. If the "don't care about the poor" attitude wasn't so prominently on display all the time, maybe they'd be more kindly disposed to them, with regards top rates of tax.
Anyway, less trickledown, please, more substantial flow would be appreciated. More spending power for the less well off means more entrepreneurs can get rich by selling them stuff.
"A rising tide floats all boats", as the saying goes.