Just posting this as i saw your reply James, so is this the family?
1841 HO107 / 488 / 6/40/ 26 Spelt Jenins
Joseph Jenins age 30 b Kent
Lydia age 30 b Kent
Joseph age 8 b Kent
Sarah age 5 b Kent
John age 3 no place of birth given
Address Church Street, St Pauls Deptford, Greenwich
Sorry cant read occ 
Sue
Yes, that looks like them.
Children of Joseph Jennings and Lydia Loud:
1. Joseph Jennings, b. about 1832, Enfield, Middlesex
2. Sarah Jennings, b. about 1835
3. John Jennings, b. about 1835
4. Edward Jennings, b. about 1837, Deptford, Kent
5. William Jennings, b. about 1842, Deptford, Kent
6. Charles Jennings, b. about 1849, Stepney, London
I believe we've got an 1851 census entry for them too, which is where I got the birth details for Joseph, Edward, William and Charles from. It's probably on this thread somewhere.
As for the marriage, I found it on the IGI over at Family Search.
Father's name came from the christening of Eliza Jennings (who married James Hedges) on 28 February 1816 at Upper Street Independent, Islington, London. That's also from the IGI.
Plus we know the mother is named Sarah, because of another census entry.