« Reply #2 on: Monday 16 June 14 10:11 BST (UK) »
As the link CaroleW has posted shows, the registration district mainly covers Northamptonshire. However, it's also possible that it could have been a Register Office marriage, in which case the marriage certificate would be the only way of finding the details.
Northamptonshire PRs are being digitised by ancestry but no launch date is known, so depending on how quickly you need the information, it's probably better to purchase the certificate.
You could try emailing Alan or Marilyn to see if they can do a lookup in their Northamptonshire Marriage Index (or Marilyn may pick this up on RC) -
http://www.rootschat.com/links/014vf/
(KENT) Lingwell, Rayment (BUCKS) Read, Hutchins (SRY) Costin, Westbrook (DOR) Gibbs, Goreing (DUR) Green (ESX) Rudland, Malden, Rouse, Boosey (FIFE) Foulis, Russell (NFK) Johnson, Farthing, Purdy, Barsham (GLOS) Collett, Morris, Freebury, May, Kirkman (HERTS) Winchester, Linford (NORTHANTS) Bird, Brimley, Chater, Wilford, Read, Chapman, Jeys, Marston, Lumley (WILTS) Arden, Whatley, Batson, Gleed, Greenhill (SOM) Coombs, Watkins (RUT) Stafford (BERKS) Sansom, Angel, Young, Stratton, Weeks, Day