We either do the same as the French & send off a general-purpose PGM (preferably with an imaging seeker) towards the identified location of a SAM system, or hurriedly buy something from someone else if we ever need it.

That MBDA Spear III thingy might have something to do with the RAF decision of not acquiring a direct follow on (AKA “anti radar specialist munition”) replacement for ALARM (that or i am being too optimist and the actual answer is “no money”).

Cheers