This marriage isn't at Bromley Parish Church, but Bromley dist on the BMD covers a lot of parishes, If you can narrow it down it might help, do you know where they were living?
Seaker
Just looked them up on the IGI it appears to be West Wickham Parish which would be St John. If I remember correctly the original records are still held at the church but I do know the Local Studies dept at Bromley Central library does has transcripts for this church on their shelves. They may also have copies of the original records on microfiche.
If you're not local I would suggest you give them a call (pref in the morning when they are usually less busy). I have always found the staff there very helpful and I believe they have a 15 min free of charge enquiry service. I think this is their direct line 020 8461 7170.
Best of luck
Seaker