We have a flight this winter where we arrive in LHR early in the morning after a business class BA transatlantic, and are then flying out eight hours later in the day to MUC. We have a few hours of driving to do from MUC, so I want to prevent anyone falling asleep at the wheel (understandably). I'm thinking our options are try to crash in the arrivals lounge or try to get a day room at a hotel near the airport? Does anyone have any personal experience with a situation like this and have any advice to give?