Ancestry.co.uk has just released a new collection which will mainly interest people from the United Kingdom and Australia.
It is the Criminal Registers for England and Wales for the years 1791 -1892. You will need membership at Ancestry to be able to search and view the results. They are still offering 14 days free trail. If you have not given them a go before ,then this may be the time to do so. You may be able to find some of your ancestors who were banished to Australia.