Can anyone recommend a tour company to use for a day trip from either Lille or Paris to First World War battlefields/memorials? DS (14) is studying WW1 so I'd like to take him for a tour as part of a holiday we're planning in France/Netherlands. We're travelling by train for the rest of the holiday so I'd like a tour company that picks up and drops off in either Lille or Paris (or Arras as we could take the train there from Lille easily). There seem to be loads of different companies on TripAdvisor so I just wondered if anyone has a personal recommendation? Thank you.