Hercyleese -
Why build risk into your operations knowingly by putting all AT into a single airfield, with a single runway?
Mate, post SDR, the only AT we'll need to move UK Armed Forces and equipment around, will be one Shorts Skyvan or equivalent. I gather the Omanis have one we could use - may need a bit of a dust off and some wheels, but dirt cheap my friend.
In this context, one runway will be more than sufficient.