'Explosions were heard in the area around the Machzike Hadath synagogue, and police say that was due to gas canisters onboard the Hatzola Northwest ambulances.

'The London fire service said those explosions "caused windows to break in an adjacent block of flats".

'Footage posted on social media appears to show three hooded people pouring gasoline on the vehicles before leaving the scene'.

Considering the significant support for a banned terrorist organisation in Palestine Action in London alone, as well as the spate of physical sabotage incidents against the UK DIB by Pro-Pal entities, I am not certain that this targeting of an essential service for the Jewish community was the work of the IRGC (alone).
https://www.abc.net.au/news/2026-03-23/jewish-ambulances-explosion-london/106486762

Breaking: Jewish ambulances set on fire in suspected antisemitic hate crime in London

Footage posted on social media appears to show three hooded people pouring gasoline on the vehicles before leaving the scene.

I'm not sure how this is merely an antisemitic hate crime as opposed to an act of terrorism, given the sheer violence of the result, as with the Manchester and (attempted) Australian synagogue attacks.