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 .   Then we take the first Heathrow Airport . What ’ s the total distance ?   The journey around the M25 is 33 miles and then 3 extra miles to get to the airport . So how many miles is that together ?   22 miles to the M25 , 33 miles on the M25 , and 3 after that . That ’ s a total of 58 miles , isn ’ t it ?   It shouldn ’ t take us very long to cover that distance . Remember that we can go quite fast on the motor way .   We can only go fast on the motor ways if there isn ’ t much traffic . I think we should allow ourselves plenty of time to get there . Being early is much better than being late . 