Sir Howard Davies' report calls for a third runway at Heathrow to be mitigated by 13 measures such as banning night flights to a noise limit. Today, I asked him whether he'd still back the third runway if these conditions were not met. Unfortunately, he seemed to fudge his answers when it came to night flights, suggesting some measures are absolute requirements and others would be nice. This gives Heathrow ample scope to ignore the bits of the report they don't like. A third runway would be a huge mistake for London. Sir Howard needs to come clean on which parts of his report are absolute requirements. I'd like a point-by-point explanation.