The Eurostar train bound to Paris from London is practically the best mode of transportation to take. It is also the fastest way to get to Paris since travel time would normally take 2.5 hours. You will be given an option of choosing first class and second class tickets. Of course, the first class tickets are expensive but if you have the budget there is no harm in choosing bigger seats along with free meals. But to those who are in a budget stick with the second class tickets. Anyway it will just be a short journey.

You must also be aware that seat reservations are imposed in most train stations in Europe. Having a ticket alone will not guarantee you a seat therefore make sure you have reserved a seat before your departure date. You will also have an option of choosing your seats. But if seat arrangements are not a big concern then no need to provide specific seat instructions.