I would hope Nicholas that you have the chance for a guide whilst you are there possibly and therefore could ask them, or the permit provider? I would suggest though that the normal rules apply for river fishing for trout be that chalk stream than peat burn. Flies choice will be locally dependant so find out from locals or river reports.
Only other thing you may need is earplugs if you are near annoying sasanachs battering on about Euro footie exit.
Tight lines.