National Archives (General)
Another facility, which yields more information - for example friends of the family, is by using the Advanced Search - for witnesses at weddings - also shows where family members were at that particular time
e.g.
Searching for surname Court
11 March 1782 - in the Parish of St Briavels,
Edward LEWIS, married Mary MORGAN
witnesses were: William COURT Jnr and Elizabeth PRITCHARD.