As a UK resident, and an FR employed pilot, I asked the UK revenue about this. They advised me if I worked and paid tax outside of the UK this was fine. They also said however, If I spend and average of more than 90 midnights in the UK each year, I should also file a self cert every year and they would levy tax on the diference between what I paid outyside and what I would normally pay here in the UK.
All of these schemes seem fine until the revenue catch up with you and hit you with a big bill for back taxes!