They’d sure be stupid not to.
We have a naval base in Qatar and other assets in Oman. We’d get dragged into it whether we liked it or not. Iran hates us as much as it hates the US because of MI6’s role conniving with the CIA to entrench the Shah. One advisor to Ayatollah Khamenei even called us ‘worse than America’. If war breaks out with the US, they will not leave us alone.
For a split second, I thought the Boris/Hunt competition had now diverged from Brexit to joining the Union.
Given that they are the ones whose fault it is, ultimately, they had damn well better.