answer: #Person1# and #Person2# check the route from where they are to the airport according to an up-to-day map.
documents: #Person1#: OK, I've got an up-to-date map. Let's check the route from here to the airport.
  #Person2#: OK. Here we are. So we drive to the A120 and turn left.
  #Person1#: No, we turn right. Remember that we are coming from this direction.
  #Person2#: Oh yes. Sorry. We need to drive only 7 miles to the M11 Motor Way and then we turn left to join the motorway and drive south.
  #Person1#: According to the map, we get off the M11 at the second intersection and joined the M25. That's the motor way that goes around the edge of London.
  #Person2#: That's another 15 miles so that's 22 miles in total so far.
  #Person1#: Then we drive west on the M25.
  #Person2#: Then we continue driving on the M25 when it turns south. When we reach exit 15, we turn left and drive along the M4. Then we take the first exit for Heathrow Airport. What's the total distance?
  #Person1#: The journey along the M25 is 33 miles and then it's 3 extra miles from there to get to the airport.