Do you know about Jim's Beer Kit, Phil? Top notch homebrew forum in the UK. I've gotten lots of good info from there. No recipe for you, though.http://jimsbeerkit.co.uk/forum/
According to a poster there, it's in Graham Wheeler's "Brew Your Own British Real Ale" as Banks's Originalhttp://jimsbeerkit.co.uk/forum/viewtopic.php?f=5&t=30078&p=325145#p325145
97.5% Pale Malt
2.5% Black Malt
Bitter with Fuggles, a small amount of Goldings at 10 minutes. No guesses at yeast, which is the biggest drawback of the book.
It does have a bunch of mild recipes so it might be worth looking around for.