I brewed one on Saturday.
It was roughly 96% Fawcett Maris Otter and 4% Weyermann Carahell, plus 1 oz. of acid malt.
Hops were all Pride of Ringwood (10% AA): .75 oz at 60 minutes, 1 oz. at 10, and 1 oz. at 5.
Wyeast 1275
OG was 1.054, which puts it a little high per the BJCP guidelines, but with a style where there are only 2 commercial examples, I feel like you have some leeway.