I'm taking the TGV from Paris this year, usually I join some others by car, but this seems to be a fairly easy way to get to Le Mans. It's quite expensive too... (€ 198 return ticket from Maastricht (NL) to Le Mans via Brussel and Paris).
I find Eurostar from London to Brussels (and Paris) the easiest way to travel from / to the UK and you don't have to stand in line to check-in / collect your luggage.