On leaving UK submit P85 form. If you are on a full time contract, stay out of the country (UK) I.e don't visit for more than 90 days a year and you don't work in the UK more than 20 days a year then you will be deemed offshore for tax purposes.
Break any of the above and you the will be assessed on such things as wife, kids, schools, golf club to determine tax status.
Any tax due will depend on tax treaty with country of employment and how much tax you pay there which could include any your employer pays on your behalf.
Any income (rental) generated in the UK will need to be declared and maybe liable to tax.
You need to stay out the country for a full tax year, so go for 3 months decide you don't like it then you will need to pay tax on earnings.
The above is my understanding and maybe complete bollocks, as has been suggested if you are really concerned seek expert advice.
Before returning onshore at some point in the future such matters as crystallising any capital gains liability generated by the offshore earnings needs to be considered. Again ask an expert.
Last edited by Enecosse; 24th Jul 2013 at 22:15.
Reason: The bit about being out UK for a tax year