I have just spoken to the great northern one aka Wally Dugan who has confirmed to me that the information above is incorrect, as he has all the post war registration no's and the contracts stating which vehicles were allocated the new type numbers starting YA through to FM which is possible the only copy left in existence or at least seen by him in the last 20 years, this one came to light approximately 3 years ago, and he is now currently waiting for 4 volumes containing war time census no's and the link to the post war numbers and in some cases the regiment who was using the vehicle up to the change over in 1949.