Was looking up Asa Briggs on Wikipedia (for want of anything better to do on a Wednesday evening) and followed their link to KBGS at the bottom of his page. Listed were articles on David Jeanes (whose first name was Horace!) and RA Westall, who (I didn't know this) became a best selling children's author. I always found him a bit creepy, and it sounds like his children's books ('dealing with dark adult themes') were a bit creepy too! Lots of other links there, so maybe of interest?

Presume you mean this section.

Disappointing that Oakbank (www.oakbank.org.uk) has no history of the school and no mention, that I could find, of its roots in centuries of Keighley schooling.

That's right, Chris. RAW also has a website with photo in his later days here
http://www.robertwestall.com/robert_westall_biography.html