The average Australian full time worker does 4.3% more hours per week than those in the United Kingdom.
When moving from one country to another, one of the things worth checking is the amount of time to be spent working.
Only your individual job will give you the REAL answer, but an indication may be available from averages for each country.
The following show examples for Australia and the United Kingdom
Australian average week: Full Time ; Employee ; Persons ; 43.2 hours per week
http://www.abs.gov.au/AUSSTATS/abs@.nsf/Lookup/4102.0Main+Features20Mar+2010UK workers in full-time jobs put in an average of 41.4 hours every week
http://news.bbc.co.uk/2/hi/7598467.stm
Based on the above, the average Australian full time worker does 4.3% more hours per week than those in the United Kingdom.