Here is the marriage in St. Paul Chatham. You can download the image from the link.
http://www.rootschat.com/links/0cbe/ John in 1851
RG09 piece 357 folio 179 page 20
GARRATT, Edward Head Married M 37 1824 Copper Smith St George...Middlesex
GARRATT, Elizabeth Wife Married F 37 1824 Shoreditch
GARRATT, Elizabeth Daughter Unmarried F 10 1851 ...Poplar
GARRATT, Edward Son M 12 1849 Scholar Southwark
GARRATT, John Son M 10 1851 Scholar Portsmouth Hampshire
GARRATT, Eliza Daughter F 8 1853 Scholar Portsmouth
GARRATT, Thomas Son M 5 1856 Portsmouth
GARRATT, Alfred Son M 4 1857 Portsmouth
GARRATT, Sarah Daughter F 1 1860 Portsmouth
Jebber