Dr Julian Lewis: At what level of exorbitant expenditure will the Government finally decide to pull the plug?

[The Secretary of State for Transport (Grant Shapps): As I say, it is not just a question of the expenditure. As I mentioned before, it is also what the benefits are. May I ask my right hon. Friend just to be patient enough so that the data is covered on both sides of that, and we can come to a rational and sensible decision?]