Last night I went to a wedding rehearsal in Didsbury Manchester, to work out the blocking of the movements, where I could be during the ceremony and what I couldn't do or where not to be. The vicar in the Didsbury church was really helpful and a top guy. He laid out that there were next to no restrictions and I wouldn't be limited to any specific place to take my pictures during the rehearsal (and the wedding shoot itself ultimately).
I never take these rehearsals for granted and is something I attend at every given opportunity. Its obviously essential for the couple a few days or more before the wedding to work the ceremony out with the vicar or whoever is leading the proceedings, but I always learning something new too. - AB