They can shove their defence up their arse. Everything's already been cut to the bone in this country. People need to eat, and aren't going to be told they need to give up even more to help fund "defence" against countries thousands of miles away and a country that has been brought to a standstill against a significantly weaker military in Eastern Europe.
We're completely surrounded by allied states and in NATO which is supposedly a deterrent against any hostile actions. Sorry if we're not shitting ourselves with worry.
The British Empire and mighty Royal Navy of old does not exist anymore. These people are either deluded or have vested interests in helping the arms industry get fat government contracts. Either way, they can piss off.