Police To Target Drunks - Gatwick

I overheard a conversation the other day, where some people said that Brits' behaviour abroad was appalling. That they were OK when they were in the UK but once abroad that they were rowdy and drunk.
 
What is the legal standard for drunkenness in Britain? Here in the US it is 0.08 BAC (at least for drunken driving).

Why would Britons want to get drunk and rowdy at an airport?
 
What is the legal standard for drunkenness in Britain? Here in the US it is 0.08 BAC (at least for drunken driving).

Why would Britons want to get drunk and rowdy at an airport?

There have been many incidents these last few weeks where planes have had to been diverted due to drunk passengers being disruptive. You can imagine the cost and wast of time both to the other passengers and crew !
 
There have been many incidents these last few weeks where planes have had to been diverted due to drunk passengers being disruptive. You can imagine the cost and wast of time both to the other passengers and crew !

But what is motivating this sort of misbehavior?