Channel tunnel
The tunel is no where near full.
In fact it has less trains using it than last year not the car shuttles have been cut back.
It was another case of bad goverment projections.
What is clogged up are the rail lines into the south of london.
That is why the eurostar has few trains in and out of waterloo in the rush hours.
In 2007 they will have there own line to Kings cross and that opens up a large area north of london.
A lot of slots at airports could be opened up by doing less 200-300 sectors.