We leave the house at 1430 and check in to our London hotel at 1730. The Eurostar from Lille is just 90 minutes from St Pancras. Perfect for long city weekends! They have discount midweek fares from about 40€. The first day we exhausted ourselves with a morning at the Victoria and Albert Museum. Then a quick lunch and a rest before heading to the West End to see Our Neighbor Totoro. It has been playing a year here now - it is a totally amazing experience for anyone over 5 years old.