A Tory government propped up by unionists would be a hung Parliament; the price they would demand for support - free bowler hats for the under-fives, compulsory band practice, a full bailout of that Renewable Heating thing - would be far too much to pay.
I'm pretty sure the DUP will vote against Corbyn without any incentives given the rhetoric I've heard last few days. The only thing is I suppose there's a slight chance of SF ending abstentionism to back Labour if the numbers suited. I sense they would be interested.

