From The Independent (here):
The Civil Aviation Authority (CAA) assured the public that air services were safe last night, despite the emergency grounding of RAF training flights following the discovery of volcanic ash. Responding to the decision to suspend flights of the £69m Typhoon jets to check for the presence of volcanic particles, Britain's air regulator said commercial airlines had made "no reports of damage to [commercial] planes".
The existence of ash in the Typhoon, stationed at RAF Coningsby in Lincolnshire, echoed the damage done to a Finnish Boeing F-18 Hornet, which collected sharp volcanic dust following a test flight last Thursday. The Finnish air force released pictures of the engine, saying: "The images show that short-term flying can cause substantial damage to an aircraft engine." Last night, the Ministry of Defence sought to downplay the threat to passengers, saying the ash had not caused any damage. "These are very high-performance jets so they are just being extra-cautious," a spokesman said, adding operational flying would continue.
Thinking of the wider picture, the authorities wouldn't, would they? They just couldn't ...