Hi Viv, Jane
I'm on a break from genealogy at the moment but will pick this up when I restart my searching - likely in July.
I have the West Sussex criminal register and can see his deportation on the Lord Melville on 5th January 1829. His original sentence was for 7 years.
As you say, both forename and surname are common and there are a few George Morrises being married in and around Chichester in the early to mid 19th Century
Will be back in touch in July