You'll find the Gendec for Jersey at the aeroclub, fill it in there upon arrival & it is then faxed from the Aeroclub to the Customs/Immigration at the other end of the airport.
The other UK Special Branch approval is done at your end with the written form/fax (as mentioned by down & out).
The tel number for Nottingham's Chief Constable is:
0115 967 0999
Sherwood Lodge
Arnold
Nottingham
NG5 8PP
Have a good trip.
FB
