We still unconditionally support the military side of the campaign considering our RAF overflights, joint bombings of Yemen, and F-35 parts exports. This is just the bare minimum to keep Starmer out of the Hague.
The government has argued the last part (F-35 parts) is acceptable as it does not believe Israel is committing genocide. So thats the level of cope the govt is on.
Iran has a bank of Israeli nuclear sites to retaliate with. Netanyahu might still want to flatten Tehran but any response will be MUCH more harsh for them