Was browsing the ATO website last night (as one does ...) ... and noted this Interpretative Decision, which appears to confirm that lump sum payments received by Aussie tax residents at retirement age deriving from pension schemes left behind in the UK can give rise to a tax liability in Australia under section 27CAA of the ITAA 1936:
http://law.ato.gov.au/atolaw/print....ID20019%2F00001

I mention this as I know a number of people see final salary schemes as valuable (rightly in my view), and decide not to transfer their pension fund to Australia because of the attraction of such schemes => one shouldn't overlook the tax consequences of so doing.

As ever, those affected should take independent advice before making any final decisions.

Best regards.