When Chris and Susan speak to the Nottingham police about Eurostar tickets, they ask for seats on the 2334 departure from Lille. Later, as police arrive at a London train station to pick them up, a clock is seen displaying 2355. Though the ride from Paris to London is over two hours, France is 1 hour ahead of the UK and when Daylight Savings Time is on, they are 2 hours ahead. So the times displayed in the show are correct.