I'm not going to do very well at this, since I've never driven on the continent, have no intention of doing so in the near future, and would look up a guide to this sort of thing before doing so.
1. In which country is a reflective vest not yet law? (UK is not the answer!)
Don't know, but since it is law in most of them (most likely including francy and holland, the main ferry ports) you may as well have one.
2. Where should this reflective vest be kept?
Don't know, but if you accept that wearing one before venturing out onto the road is a good plan, then keeping it in the boot is kind of dumb unless you can reach the boot from inside the car.
3. What is the letter of this law regarding the wearing of one of these vests?
no idea.
4. What spares MUST be in your kit? (all EU countries - not UK)
I'm going to go with bulbs since they're the only one that's a safety issue for other people.
5. Do you really need those headlight adapters? Explain your anwer!
Apparently Xenons are switchable, though I know for a fact the ones on my Legacy aren't. Neither are the aftermarket ones. I guess if you have the switch then you don't need the adaptors. Also some people like to change their entire headlight unit for european ones whilst on the ferry!
6. Under what circumstance could you get away with not displaying a GB sticker on your car?
If you have a numberplate with GB and the euro star thing.
If you haven't bothered to register your car with the DVLA since you immigrated here.
Excludes Switzerland.
7. List the documents you should have on your person when drivng on the continent and why would they not accept an old UK paper licence?
No idea, but I'm guessing driving licence would be one of them. Insurance, MOT and logbook are quite likely too.
8. What are the drink drive limits? Are they the same as the UK?
Dont know, don't care. I wont drive if I've had any alcohol at all, same as I do at home.
9. What are the speed limits in France.
Don't know. If the EU get their way though, probably 90kmh!
10. What might make someone like me sniff around your car? There is a clue given the national sport
If it's France, pretty much any sign that you're from England, double so if it's a performance car at which point they'll be looking for radar detectors and the like. Given your clue, I'm going to go with chav flags and scarves streaming from the windows etc.
11, What else do the Germans, Austrians and Swiss insist you carry in your car - other than spare wotsits?
If it's the Swiss, probably a gun or something!