I have a customs declaration document in word format you can use. I am off to a wedding now so if your E-mail is on your profile expect a word doc from me. If not, tough.
You need to fill it in, sign it and fax it to the Airfield you will return to. You also need to file a flight plan at least one hour before you take off (for both legs) and of course you have those constant wear life jackts don't you?
(Edit)...just checked your profile and no E-mail, before you leave, fill in a customs doc, make sure you stay away 4 hours.
Also, not sure if you have done this before but if not, the Channel is usually quite murky, the vis is hopeless and you should be prepared to go onto instruments just after coasting out. (Sorry if this is teaching Granny to suck eggs)
[This message has been edited by New Bloke (edited 09 June 2001).]