Second Oldest School
It was the tradition at school to believe that it was the second oldest school in the UK and I have taken the time to try to verify this. If you believe Wikipedia then they address the matter under 'List of Oldest Schools in the United Kingdom' and they actually list 12 other school, starting with The Kings School Canterbury (founded in 597) and of course The Minster School York (founded 627). This then makes Minster School Southwell the 13th oldest school. I would be interested in any other views on the matter.
What is not in doubt that the school had its millenary celebrations in October 1956 which was patronised by HRH Princess Margaret for evensong.