Hi Millview
The information in parish registers for marriages is often little more than what you see on the index, the name of the couple. Sometimes you may get the bride's father's name & sometimes an occupation for the groom, but not always.
If you don't live near the appropriate record office, you may be able to find a film of the image at your local LDS family centre as noted by Cardiff.
The record you found does not have an LDS film number (which is unusual). It does, however, have a print number. If you click on the print number you will find the following comment
Original source of extraction is not available. You may wish to check the original parish registers for Colchester, St. Mary-at-the-Wall, see film no. 1565522 items 13-30 (42x), it covers the years that were extracted so the film you would need is the one given here.
You can find your closest LDS centre via the home page at
http://www.familysearch.org (find a family history centre near you) - worth a visit if you haven't been, just to see what they have available.
Trish