It wasn't just the gravities and hopping rates which were pretty similar. There was also a fair degree of similarity in the recipes. All the examples are over 75% base malt. In the case of Whitbread, split into pale malt and PA (Pale Ale) malt. The latter being a top-quality pale malt.
Shepherd Neame's AK, like their other Pale Ales, was 100% base malt. Well, other than a tiny quantity of malt extract.
Crystal malt only appears in The Whitbread and Greene King versions. As I keep reminding you, crystal malt only became generally used in Pale Ales after WW II.
The sole other ingredient is flaked maize, which appeared in both Fullers and Greene King AK. My guess is that it would turn up in pretty much any other brewer's AK. Shepherd Neame and Whitbread being in the small minority of brewers who employed no adjuncts in their beers.
|AK grists 1925 - 1939|
|Year||Brewer||Beer||pale malt||PA malt||crystal malt||flaked maize|
|Fullers brewing records held at the brewery.|
|Greene King brewing record held at the brewery, document number AC93/1/12 .|
|Shepherd Neame brewing record held at the brewery.|
|Whitbread brewing record held at the London Metropolitan Archives, document number LMA/4453/D/01/096.|