The mistake on that chart is putting "bus shelter posters" by 6 sheets when it should be by 4 sheets. Otherwise the chart looks exactly right to me.
Paul, as far as I can tell, English one-sheets and half-sheets were never used in England! They do not appear in pressbooks, and I have never found an English collector who told me they saw them in ENGLISH theaters.
I have been consigned many hundreds of them, and they almost always come from former British colonies (Canada, the U.S., Australia and South Africa) leading me to think that they printed English one-sheets and half-sheets as export posters (in the sizes commonly used in those countries), and used solely half crowns, crowns, quads, etc, at home.
Bruce