Right-wing authoritarian Starmer-regime approves joining Trump and Netanyahu's crimes against peace, planned and chosen war of aggression, by giving "authorization [...] for the U.S. to use military bases in Britain to carry out strikes on Iranian missile sites", which does make at least those military bases valid targets for the attacked Iran-theocracy insofar as to end those attacks.
https://www.reuters.com/business/aerospace-defense/uk-approves-us-use-british-bases-strike-iran-missile-sites-targeting-ships-2026-03-20/
Calling a war of aggression "defensive operations" does not magically transform it from being a war nor a war of aggression at that, just as it didn't and doesn't for Putin's exactly as much crimes against peace "special operations" in Ukraine. Starmer also remains a sniveling spinless elitist sycophant no matter how hard Starmer works at socioeconomically assaulting the productive classes in the U.K. to pleasure tRump.
That the Iran-regime is imperialist murderous reactionary oppressors, etc and must fall does not change the previous.
State vs State war is not for the people, it's for the rulers crushing the peoples for their own thirst for bloody prestige and power.
Only the people can liberate itself. Imperialism doesn't, no matter under which flag.