Can't see any reason why they aren't thrusting the keys in your general direction.
After all, the most useless thing on earth is an aeroplane and if you are flying it, its earning them some money.
The only reasons I can think of for them refusing to let you fly are that all the aircraft are already booked, the weather is not suitable or that you are not current. Try asking them why.
And do you really fly from Fair Isle??
A wonderful place - I really must go back there.