You'll need to go pick out you silencer first and your dealer will give you some of the paperwork. Take that to your CLEO, Get him to sign off on it and get finger printed. You'll need two finger print cards. Get two passport type pictures and your payment. Send all that off to the BATFE.
The paperwork that your dealer gives you will have all the info. on your suppressor (Serial number, description, caliber & such).
Hope that helps.
VISUALIZE WHIRLED PEAS
MAY THE HORSE BE WITH YOU!!!