Just cos I'm bored knocked up a list of stuff we need to take with us
Feel free to add other bits N bobs .
a few links to the cheapest I could find
Important
Driving licence and NI number
Insurance cert
Passport
V5C Certificate
Crit’air sticker ( see below)
Travel insurance docs
European Breakdown insurane docs
Equipment:
Reflective jackets for each person.
linky
A warning triangle
linky
Headlamp beam deflectors ( probably different types for mk 1 & 2's ) ?
Breathalyser for each person
linky
GB car sticker
linky
First aid kit
linky
A Fire extinguisher
linky
Not the cheapest but you can colour match your car
Spare bulbs
A torch.
A spare fuel can ( i'd best take 2 or 3 )
Additional engine oil and water
Decent road map or satnav
Any medications to cover the trip
Photocopies of important docs
European Health Insurance card.
linky
Reckon those drivers of Dirty Dizzles and Old dodgy V8's, and possibly all of the rest of you might need a
linky .. 
But then we may not go any way that needs one
Chris