If anything, the opposite might occur.
Thatcher made cuts to our defences so that the Falkland Islands were unprotected and inviting an invasion from the far right Argentinian dictatorship. We belatedly launched a recovery mission that resulted in hundreds of deaths, but today, all those sheep and penguins can sleep without worry of molestation.
On Friday, a terrorist that Labour had locked up a decade previously, but the Conservatives had let out early, went on the rampage and killed two innocent victims. There is no recovery from that. No armada, sacrifice of brave sailors lives or jingoism can improve the dire situation for the Tories. They *** up and people died as a consequence.
I doubt it will make any difference on the election either way, and definitely no bounce for Boris.