if you are in the uk a max of 90 days per year
I confirm, but be aware that the inland revenue is trying to change the rule at the end of this tax year (6th April) which currently says you don't count the day you arrive and the day you leave, so 90 days can build up very quickly (
http://www.ft.com/cms/s/0/4f7741f8-a...0779fd2ac.html)
I also recommend getting a good accountant as the issue is very complicated but generally speaking the UK is only interested in tax on assets or income generated in the UK, unlike some other EU countries that tax you on your worldwide assets, and a potential employer would probably help you out with PAYE (ie. they would pay the tax on your behalf).
CTG