Fallmonk and Aeronut - Sorry chaps.
There are very good reasons why the main gate route was not used - I could give you a very long and technical explanation but it basically ends up with the fact that there are only 2 main roads out of Leuchars Village so having 3 exits would not have helped as any many gate traffic would have still had to merge with the other routes which would have caused further delays. I hope that this explains that situation; but it doesn't excuse the fact that you had the end of you day ruined. Sorry again.