16.9 miles
according to one movie 80 days.... not sure the mileage
According the AA Route Planner (GB Edition) the distance is 37 miles, this will take about 1 hours and 4 minutes to drive, assuming you take the direct route to the centre of each location and there...
8 8
4,569 miles London Heathrow Airport (LHR) to Tribhuvan International Airport (KTM)