To conform with the road laws in Europe and this varies between Belgium, France, Italy Austria, Germany ect
(All countries I drive in)
You need
First Aid Kit (A legal must in Germany for example)
High Vis vests for each passenger - these have to be with in reach/visible in the cabin
A complete set of spare bulbs
Fire Extingisher
Warning Triangle
If you have all that lots rolling about in the footwells for your journey there - then you shouldnt have any probs.
Have a good time all