Historic records are kept at the London Metropolitan Archive and any enquiry about records predating 1970 should be directed to them.
For records from 1970 onwards please contact the parish office by phone or email (some later records are also at LMA but we will advise if this is so in your case).
It may take a few days to respond to your enquiry whilst the relevant documents are found so please be patient. Also, please be aware that there is sometimes a statutory fee for searches and copies of registers.