Thanks so much for your replies. I have birth date for George, in 1800 or 1801, from censuses. He was born in Cudham, Kent. For Elizabeth its a bit more vague - one census said she was born in about 1804 in Croydon, Surrey, but there is a death record that matches her age if she was born in 1810... The one from 1804 died in Reigate which isn't impossible but not sure. Also, if 1804 is true, she would have had her last child at 51 yrs old, in 1855, so pretty old to have a child but also not impossible!
I'll check out the LDS centre... and Tricia, I would greatly appreciate if you wouldn't mind looking for me!