1 Passports
2 Ferry booking receipt number
3 Insurance documents (check that you have fully comp abroad) some only offer 3rd party when abroad
4 Driving license photo and paper
5 V5 log book
6 MOT if you need one
7 Car brake down recovery (European)
8 Warning triangle
9 High vis jackets for you and your passenger
10 Spare bulb kit
11 first aid kit is only law in Austria
12 Headlight converters
13 GB sticker or Eurpean style license plate
14 Personal travel insurance or minimum of EHIC free health insurance in europe
15 Sat nav and/or maps
16 Cash and Credit/debit card, you will need mainly Euro's and some Swiss Francs