Other than Eurostar, are there any sub-4-hour options to get between London and Lille (without a car)?
If booked in far enough in advance (where "enough" varies depending on the popularity of the train), it's possible to get a return between London and Lille on the Eurostar for £69 or €88 (depending on ...
When I look on the main Eurostar website about tickets, it only mentions specific-train tickets (of varying levels of flexibility), as a single or a return. I can't see anything there about any sort ...
Before boarding the Eurostar, you have to go through security (xray of bags and metal detector for people), and juxtaposed boarder controls (show your passport to immigration officers from the country ...