You should also be aware that the lump sum that is generally available from a UK pension fund at retirement age and that is tax free in the UK may well not be tax free in Australia under the provisions of section 27CAA of Australia's Income Tax Assessment Act 1936 - this aspect is rarely mentioned by Australian superannuation fund providers.
So long as one recognises there may be a tax liability in the event that you receive a lump sum from a pension fund located outside Australia when you are a tax resident of Australia I would generally be of the view that one should stick with membership of a final salary scheme.
This said there are other factors to consider, including currency risk and the ability to pass on fund value/benefits to a surviving spouse or partner - these may be better within an Australian super fund.
In short, I think one has to take paid for professional advice because your situation will be specific to you.
Best regards.
Alan Collett
alan-at-gomatilda-dot-com
Registered Migration Agent Number 0102534
Fellow of the Institute of Chartered Accountants in England and Wales
Member of the Institute of Chartered Accountants in Australia
http://www.gomatilda.com and
http://www.collettandco.co.ukOffices in Southampton - England; Melbourne, Perth, Brisbane, and Geelong - Australia