Well I am based there and I did my PPL last summer. And all i can say is that there are no frangible aerials!! The only ones are the radio mast on top of the Ops Tower, the mobile phone mast with the flashing beacon. However.....on the northern side of the runway there is the windsock and a weather station which is approximately 7 ft above the height of the runway (low because they're on a down slope away from the runway)
There u go, and hope it helps
Tom