Well-if you reside in England you might find these interesting.
http://www.hmrc.gov.uk/cnr/p85.pdf
HM Revenue & Customs: International series
Also you need to study HMRC6 whihc gives lots of confusing guidelines.
Four things to remember about the British Revenue.
They are very good and nice people.
They have the power to knock down your front door at any time without any warrant and confiscate absolutely anything and nearly anyone where you live.
Whatever you think that they say will not necessarily be what they said.
They always recerve the right to drop you a note, years later, which begins with..
'It has come to our attention that....'
Anyone hear of a british member of parliament being so accosted by HMRC for house flipping or supporting his children to the tune of more than £3k per year allowance?