You are the driver of a train. Each carriage can seat approximately 100 people with room for 20 to stand in comfort or 40 to cram themselves on.
When you leave your starting point you have 148 people on board.
At the first stop, 6 people get off and 87 people get on.
At the second stop, 3 people get off and 63 people get on.
At the third stop, 12 people get off and 119 people get on.
At the fourth stop, 7 people get off and 98 people get on.
At the fifth stop, 14 people get off and 67 people get on
At Kew Bridge, 8 people will get off and 55 people are waiting to get on.
Question: Do you cancel the four carriage train, or the eight carriage one?
Clue: SouthWest trains got the answer wrong again this evening.