So it's about cutting overseas aid and vainly hoping that the savings will be applied to flood defenses. Pardon me while I
At least we can be sure that your government will not spend any savings on the NHS, nor on affordable housing, nor on education ... not on any progressive social programs. If in the unlikely event that they do cut foreign aid, the savings will more likely be dropped on ISIS, or used to cut corporate taxes.
Here's my theory: the government will spend a nominal amount, make appropriate noises about "preparedness", and keep their fingers crossed that no more major floods occur in the near future. And if they do happen, it's probably cheaper to free up some funds for disaster relief than to actually do something to protect vulnerable areas.
If you disagree with your government's foreign aid policy, you could do so without muddying the waters
with concerns about the flooding.