Not seen it mentioned, but as of February, air passenger duty will rise, so for long haul business passengers, they will now pay £80 instead of the current £40, and short haul economy ones will pay £10, up £5.
http://news.bbc.co.uk/1/hi/uk_politics/6213328.stm
http://news.bbc.co.uk/1/hi/uk_politics/6213328.stm