HD,
I don't see how the answer to your question "Green Goddess??", can really be other than "Yes". Wouldn't it be much the same for, say, a motorway pile-up? The military can only send what they've got available.
Having said that, I believe there are some indications that the civil fire brigade might respond to major emergencies, even whilst on strike - but I doubt there's any guarantee.
As an aside, I noticed earlier last night that the Police were using the electronic motorway signs to caution drivers:-
"FIREMENS STRIKE - DRIVE WITH EXTRA CARE"
Let's hope we don't have to resort to putting something similar on the ATIS!!