Hi Claire, Welcome to the Sussex board of Rootschat

Well, you're in luck, I found their marriage on the Sussex Marriage Index (which normally only goes up to about 1837)
Chichester All Saints, West Sussex, 1 Jul 1839:
George REDMAN, full age bach carp South Pallant Chich
Charlotte DUCK, minor sp South Pallant Chich
I would say that CARP=carpenter
If Charlotte's age is correct on the census then she would have been only 17 when she married.
You say you don't know when EDWARD & the rest of the children went to Oz, do you mean GEORGE?
The 1851 census states George was born Chichester & Charlotte, Appledram which are adjacent parishes in West Sussex & right on the Hampshire border.
Your next move would be to get their marriage certificate which will give you parents names. It's on FreeBMD, September quarter 1839, Chichester registration district (7 269) A copy can be obtained from GRO (Google & you'll find their site)
The only likely siting of George & Charlotte in 1841 is this one;
1841 - Sutton, Ssx HO107/1094/11/8/9
Constant Redman 65
Samuel 35
CHARLOTTE 20
GEORGE 20
Eliza 5
Sarah 25
William 4
Charlotte 1
All born Sussex. Not sure what relationship they are to each other. I thought that maybe Constant was George's mother but I can't find a possible marriage on the Sussex Marriage Index.
jane