David Cameron will open the Tories' European election campaigning vowing that only his party can deliver an In/Out referendum on EU membership.
The Prime Minister will point to what he claims is a "track record of delivery" on dealing with Brussels, including vetoing a European treaty in 2011 and helping secure a cut in the EU budget.
Speaking to party activists in the West Midlands, Mr Cameron will again stress his commitment to giving voters a choice over EU membership if his party wins the 2015 general election.
"Believe me, whatever it takes, I will deliver this in-out referendum. Labour won't. Ukip can't. I will," he will say.
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At least three children and 18 others - including members of the local police force - were among those who died.
The Foreign Secretary was unable to rule out the possibility of continuing to pay money into the EU when he spoke to Peston On Sunday.
He told Peston on Sunday: "The country is crying out for leadership from the Prime Minister. We want to know her vision."