How do you store luggage on top of your car?

How do you protect your luggage on European trains-Eurostar?

• I have a Standard class ticket and I'm worried about my baggage. I read on the eurostar website that I may have to store my luggage in a separate car if everything's full in my car. How can I protect my luggage? Lock? Can I go early to ensure my stuff has room? HELP! Do I need to buy a flexi lock? anyone have a link?

• Answer:

  My wife and I travelled on the Eurostar this summer and there was lots of room for baggage. There are racks at both ends of the cars and smaller ones above you. I can't imagine that you'd end up sitting in another car from you luggage but I suppose it is possible. You can go early but it generally won't be that much help to you as you clear customs and then you end up sitting in a boarding lounge with everyone else. You end up boarding pretty much all together anyway, at least that's the way it was on the London to Paris route. I wouldn't buy a lock just for the Eurostar but if you need one anyway because you're staying at hostels or something then sure, go head get a lock.