1. I left in June 2010
2. At present my job looks pretty permanent so the reason we are considering selling the house in UK is to buy something in Sydney. Renting is very expensive.
3. We have been back to the U.K. twice on holiday to visit family.
4. Have not declared rental income because it has been very sporadic. Family members have occupied the house for a lot of the time I've been away.
Having had time to think about your answer - I am not entirely sure that I understand the first paragraph. Do you mean that I have to be out of the UK for 5 years or more before being treated as non-resident and therefore not subject to capital gains tax. In other words, should I delay selling the house until I've been away 5 years which will be June 2015.
Thanks for your response and seeking clarification.
No it means that as long as you remain not resident in the UK, for at least 5 years, during which time you sell the property, then it will not be subject to capital gains in the UK