« Reply #5 on: Wednesday 11 November 15 12:50 GMT (UK) »
It can also depend on how common the surname of the couple was and their first names. Ie if you find a John Smith baptised in 1810 in a London parish to John and Mary Smith, there could be many such marriages c1790-1810, and they may not even have wed in London.
Durham has Dade registers which gave extra info, even parish of origin of parents. I even know some Suffolk registers which gave mmn before 1813 as well as after. Hacheston was a parish that gave mmn until about 1830ish.
Researching:
LONDON, Coombs, Roberts, Auber, Helsdon, Fradine, Morin, Goodacre
DORSET Coombs, Munday
NORFOLK Helsdon, Riches, Harbord, Budery
KENT Roberts, Goodacre
SUSSEX Walder, Boniface, Dinnage, Standen, Lee, Botten, Wickham, Jupp
SUFFOLK Titshall, Frost, Fairweather, Mayhew, Archer, Eade, Scarfe
DURHAM Stewart, Musgrave, Wilson, Forster
SCOTLAND Stewart in Selkirk
USA Musgrave, Saix
ESSEX Cornwell, Stock, Quilter, Lawrence, Whale, Clift
OXON Edgington, Smith, Inkpen, Snell, Batten, Brain