Thanks for your reply. I never worded my question very well. Although I would be working in Australia, I would be commuting between the 2 (4 weeks in Australia then 4 weeks in U.K on a rolling basis) would not be employed by a U.K employer, does this change anything in the answer you gave earlier?
My employer is offering myself and some colleagues the chance to work for the company in Australia. The company states it will cover all the Australian tax on our behalf, my question is, what - if any UK tax would we be liable to pay at the end of the UK tax year?