Plus to the degree you can buy influence with Arab leaders, protecting them, their hold on power and their assets with your military power is a very good method. Brits have been playing this game much longer than the US. Will be interesting to see if Iran strikes at tankers and oil shipping facilities in the Gulf area.

Vote of no confidence incoming.

If there are British casualties or damage to British interests, certainly could be an issue for him.

Defending the countries that the UK has made agreements with to have military personnel based there is completely uncontroversial. It was already made clear Starmer wasn't allowing the UK air bases to be used for the US bombing missions.

I expect the Tory opposition will say they want the UK to go further, eg allowing the base use, or to join in. The vast majority of Labour MPs will think Starmer's doing the right thing in the circumstances.

Not carrying out such defensive operations would be completely negligent.

It is not in support of Trump's attacks, but to protect their own interests in the region.