Contact the Inland Revenue, they are very helpful people. You might find, like myself, you will have to be out of the country for two years before you can get away with not paying UK tax and NI. As its not definite I will be working out of the country for two years, then I still have to pay UK tax and NI, up until then. The 185 day rule is a load of tosh. The swines will get you any way they can.