Lynne,
I assumed that the North Tyneside Registrars did not want to publish their code. However, your post reminded me that it is always worthwhile trying "route number one", so I did and to my surprise, they sent me the whole code, without requiring any obligation of confidentiality. Hats off to you and here is the code for Anglican churches. You will see that C-12 is indeed Killingworth St John. All other references are to Registrar's Books or non-Anglican churches.
C-1 Christ Church N Shields
C-2 Good Shepherd Burradon
C-3 Holy Saviours Tynemouth
C-4 S. Aidan N Shields
C-5 S. Alban Earsdon
C-6 S. Augustine N Shields
C-7 S. Bartholomew Longbenton
C-8 S. George Cullercoats
C-9 S. Hilda Marden
C-10 Percy S. John Percy Main
C-11 S. John Wallsend
C-12 S. John Killingworth
C-13 S. Luke Wallsend
C-14 S. Mark Shiremoor
C-15 S. Mary Whitley Bay
C-16 S. Mary Willington Quay
C-17 S. Mary Magdalene Longbenton
C-18 S. Paul Whitley Bay
C-19 S. Paul Dudley
C-20 S. Paul Willington Quay
C-21 S. Peter Balkwell, N/Sh
C-22 S. Peter Monkseaton
C-23 S. John Backworth
C-24 S. Peter Wallsend
C-25 Good Shepherd Wallsend
C-26 Holy Family Newcastle
C-27 S. Columba Seaton Burn
Additionally, my own investigations have shown
HT-CLOSED Tynemouth Holy Trinity
OLDSPT-CL Tynemouth St Peter
Keith
