we wont declare war, we will get the troops back, either by them being handed back, or the SAS looking for them and a rescue plan put into play. once they are back home, you can wave bye bye to that nuclear power plant. that will be the target the uk strikes, and that will be enough for iran to think long and hard, before they act again. that will also end the problem of them having nuclear weapons for awhile
I hope that actually happens...I would love to see someone strike them like Israel did to Iraq many years ago...