Gonzo,
If people want to leave for any other unit,then that's great for them.I have worked abroad,and people ask me all the time.I always say go for it,because we will always be amongst the lowest paid in Nats.Doesn't matter how much the traffic increases,or extra work that we are required to do.
Staff must be leaving LL for a reason as well.Maybe they want to dust off their radar rating.It gets a bit boring saying cleared to land all the time.I did it for 3 years,and was eager to get back to radar.
