Founded 6th September 1962 by Peter Clarke and Graham Byford. Graham left after 4 months (long story!) and my father remained Warden until January 1994. Father worked 7 days a week throughout the year, only having Christmas day off! I was Assistant Warden during weekends and school holidays (that was a long time ago!) I could write loads more, but I will update at a later date.
Sophie Barker is Warden at present and the NOA has produced an anniversary DVD on sale this April. I have emailed Sophie as I can't find anything about it on the NOA website – I will link it when its added.
Itinerary of events here: http://www.noa.org.uk/