From Yesterday (April 1st) their is a reduction in Flight Tax from UK Airports, if you have already paid for your Flights, you can claim this Tax back.
http://www.dailymail.co.uk/news/arti...p-Florida.html
Its not a tremendous amount for an individual but for a family it seems it can be around a couple of hundred quid for Long Haul Flights, its better in your pocket than in the Airlines coffers.