Dear Rosemary,

Thank you for your query about John Shadrack Dorman.

There are 6 churches in Southwark; Christchurch, St George the Martyr, St John Horsleydown, St Olave, St Savious & St Thomas.  The parish registers for these churches are held at the London Metropolitan Archives and therefore are available on Ancestry as they have been scanned and indexed as part of the partnership between LMA & Ancestry.

I did a search on Ancestry and found the following:-
St George the Martyr, christened 26 December 1830, born 4 January 1830 John Shadrach son of William & Ann Dormer of Red Cross Street, Mi?d (possible a shortened word for Middlesex?), shoemaker.  The surname is spelt differently from the information you gave me, but I think this is your ancestor, especially as the second christian name is rather unusual.

I hope this is of help to you.

Regards;
Linda