UK 'catters, Susette and I have a two hour wait for our guide (Micca) and I'm wondering if there might be a way to save time. After exiting customs and claiming guitar and suitcases, along with banjo, autoharp, carry on bags, etc., we need to get lunch and a National Rental Car. We'll be in Terminal 3 at Heathrow. Might there be a way to grab the car rental and lunch before meeting Micca in the waiting area and save some time?