Our plan is to drive from Canterbury, drop my mom off at Heathrow in the morning and then go to Watford. I'm not sure if we should keep the rental car or turn it in and take public transportation over to Watford. If we turn in the rental car then we'll have to request an early check-in at our hotel, whereas if we keep the rental car we can drive straight to the studio for a tour before checking into our hotel.
Does anyone have any suggestions for how we should organize this? If we choose to go with public transport and can't check into our hotel until 2 pm (worst case scenario), would we still have enough time in the afternoon to take a thorough tour of the studio?