I doubt it, certainly the package holiday companies have it covered, for instance in the Thomson brochure it says
Important note - events beyond our control
Events beyond our control include: war, threat of war, riots, civil disturbances, terrorist activity, industrial disputes, natural and nuclear disasters, fire, epidemics, health risks, technical problems with transport beyond our control or that of our suppliers, closed or congested airports or ports, hurricanes and other actual or potential severe weather conditions, and any other similar events.
and Airtours:
Important note
Compensation arrangements do not apply to circumstances beyond our control. We can cancel your holiday in the following circumstances: war, threat of war, riots, civil strife or terrorist activity, industrial disputes, natural or nuclear disasters, fire, airport closures, bad weather conditions and similar events beyond our control.
Though no doubt food vouchers will be circulated. Delayed departure due to strikes is covered in most insurance policies, but only to the tune of about £10-20 per 12 hour delay.