The Old Methodist Church

The old Methodist Church and Wesleyan Sunday School in Tonbridge built in 1872 but latterly a martial arts school,  is now being turned into flats.  There were three old doors, 2 have already been modernised. This one still remains for now but the re-development is not yet finished. I am capturing it for posterity in case this beautiful old door disappears. Any ideas what the hutch was for?