There are a couple of ways to track down a English marriage record.
Ancestry has two collections. Marriages 1837 -1915 and Marriages 1916 -2005. The second one is very good too if you are looking for the marriage record of someone who is still alive.
Free BMD search has Marriages 1837-1915 and Marriages 1916-1983 and this is free to search and view.
I must say that the second Marriage Collection 1916 -2005 on Ancestry is so much easier to search through than it used to be. Find them here