Guardian: So the Tories want a high speed rail line rather than a third runway at Heathrow. Leaving aside the fact that Boris Johnson wants a new airport in the middle of the Thames Estuary which suggests that the party is not quite singing from the same hymn sheet, there are lots of reasons to be sceptical about whether a high speed line – called HS2 in the business, as HS1 is St Pancras to the Channel tunnel – will ever be built. Politics first, though. It is commendable that the Tories are …