What would happen pact in a hung parliament..?

WRITING in today’s Tele, Conservative/Ulster Unionist Party working group member Johnny Andrews says that “Our objectives and values have converged with a reformed and newly invigorated Conservative Party now poised for power”. He goes on to argue that while the DUP engage in “little Ulster politics, it is up to us with new clear forward thinking policies to take on our historic mantle of moving Northern Ireland forward”. But with the prospect of a hung parliament now being taken seriously by senior civil servant mandarins, could the UUP/Tory pact face an early test if the Conservatives decided that DUP votes in Westminster were worth burying the hatchet with Peter Robinson?