HM Government is looking at changing the residency rules and therefore your tax liabilities. If you fly longhaul, (or even visit Britain on business) days of arrival and days of departures are to count towards your 90 days per year. Take a look here:
http://www.hmrc.gov.uk/cnr/res-dom-tax-amends.htm
Guess that would encompass all trans-atlantic crews who fly in to the UK? How do you feel about paying a great lump of your cash to the UK governent?
There is an email address for you to voice your opinions as it is at the consultation stage at the moment, but you've not got long to post your comments. Take a look.