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Flaked oats appear in the Whitbread and Truman examples to enable some to be sold as Oatmeal Stout. I wonder if any drinkers noticed that Oatmeal Stout and plain old Stout were identical? Not much to report, other than that. Some flaked maize at Barclay Perkins, along with roast barley. Truman also used roast barley in place of black malt.

Much more complications with the sugars, with seven different ones across the four breweries.

There’s No. 3 in a couple, which is what you would expect. Black sugar I’m guessing is something along the lines of No. 4 invert. Duttson and CDM are types of caramel. While cane sugar is just raw cane sugar. Something easily supplied by Britain’s tropical colonies in the Caribbean and the Far East.

Pre-WW II London Stout adjuncts
Year Brewer Beer oats flaked maize roast barley
1937 Courage Stout
1936 Barclay Perkins BS 4.35% 10.87%
1937 Whitbread LS 0.78%
1931 Truman BS 1.45% 5.06%
1931 Truman St 1.45% 5.06%
Sources:
Courage brewing record held at the London Metropolitan Archives, document number ACC/2305/08/263.
Barclay Perkins brewing record held at the London Metropolitan Archives, document number ACC/2305/01/621.
Whitbread brewing record held at the London Metropolitan Archives, document number LMA/4453/D/09/125.
Truman gyle book held at the London Metropolitan Archives, document number B/THB/C/114.


Pre-WW II London Stout sugars
Year Brewer Beer malt extract no. 3 sugar caramel Duttson CDM black sugar cane sugar
1937 Courage Stout 2.00% 2.67% 5.33%
1936 Barclay Perkins BS 11.59% 1.45%
1937 Whitbread LS 8.37% 3.79%
1931 Truman BS 4.34% 3.13%
1931 Truman St 4.34% 3.13%
Sources:
Courage brewing record held at the London Metropolitan Archives, document number ACC/2305/08/263.
Barclay Perkins brewing record held at the London Metropolitan Archives, document number ACC/2305/01/621.
Whitbread brewing record held at the London Metropolitan Archives, document number LMA/4453/D/09/125.
Truman gyle book held at the London Metropolitan Archives, document number B/THB/C/114.





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