Ok , I ’ Ve got an up-to-day map . Let ’ s check the route from here to the airport .   Where are we ? Oh , here we are . So we drive to the A120 and turn left .   No , we turn right . Remember that we are coming from this direction .   Oh yes ! Sorry ! Then we drive to the M11 motorway .   How far is that ?   It ’ s only seven miles . We turn left to join the motorway and drive south .   According to the map , we get off the M11 at the second junction and join the M25 . That ’ s the motorway that goes around the edge of London .   That ’ s another 15 miles , so that ’ s 22 miles total so far .   Then we drive west on the M25 . we must be careful to turn in the right direction !   Then we drive on the M25 . it turns south . When we reach exit 15 , we turn left and go west along the M4 . 