First point is if 80% of Olympics tourists are expected to arrive at Heathrow, a 3rd runway at Heathrow could have been built since the Olympics were won. Boris' party has first boycotted and then killed the idea.
Second point is the Tories are imposing significant cuts from each department, so Boris shows some nerve when questioning how is the Border Agency going to cope.
Lastly, the FDI went down from $186 in 2008 to $46 bn in 2010 (below France's!, a drop way below the developed economies'). If the Tories don't reverse the trend, they are either incompetent or dishonest.