ITV News has been told that the squadrons have been working over-time and are having to cancel leave as they embark on back to back tours to Afghanistan and Libya.
The combination of stress and fatigue is potentially dangerous for those in charge of powerful fighter jets.
The causes of the crash are to be fully investigated in due course.
A vessel has gone out to the crash site to locate the wreckage ahead of a salvage operation.
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At least two are dead with over a dozen injured after an attack on a teen event. Here is what we know so far.
Aspiring basketball player Stefan Strawder was gunned down as he left a teen night at Club Blu.
The suspect, armed with a gun, was caught on CCTV wearing the fancy dress mask, with a red cap on top.