Certificate Page & Vol numbers (General)

by May , Monday, February 20, 2006, 14:20 (6862 days ago) @ Jim

Seems like a transcription error. You could look at the original entry and make up your own mind about this. As you use Ancestry, try their BMD Beta search - their (enhanced?)scans of the original index are very clear.
What did the FreeBMD transcription show? If you believe their entry is wrong you can email them and they will look at it again.

Regarding changing or adding to a birth record - I think the answer is no, it can't be altered. The information given at the time of registration stands. You can change your name in various ways (deed poll, or usage etc) but the birth certificate stays the same.