Britain may have to "revisit" its position on Iraq if the threat to national security becomes too much.
Former Army officer Col Bob Stewart MP told ITV News: "Things happen and circumstances change, and if our country is threatened by people from the Islamic State, our national interest, our people are threatened, we may well have to revisit that situation."
ITV's Deputy Political Editor Chris Ship reports:
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There's no love lost between Boris Johnson and Theresa May.
Eagle, who was one of 20 members of the shadow cabinet to resign, will formally announce her intention to stand on Thursday.
ITV News visits the rural county in the wake of the EU referendum result and finds increasing frustration with Britain's political leaders.