Don't waste your time trying to get hold of a Nav Bag. Since the IPT at Wyton decided to save money by changing the supplier, they are crap. In the old days the handle was attached to the bag by a metal bracket. These days the handle is attached by a plastic/fabric loop. Guess what, this breaks when the bag has too much weight in it. Too much weight seems to occur when the bag is about half full. I'm on my 3rd one in a year.
So yet another great money-saving scheme on behalf of the RAF. Buy Nav Bags at half the cost, but get through over twice as many!!
I did raise a Threads form in stores though and apparently the IPT are on the case. So once we've got through the next 10 years stock (which might take about 3 years!) we might get decent bags again.