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04-01-2021, 07:07
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Whitbread produced several Stouts at the outbreak of war: London Stout, London Oatmeal Stout, Mackeson Stout, Extra Stout and SSS. But, unlike Barclay Perkins, which had several different recipes for its Stouts, all of Whitbread’s had the same recipe. Inevitably, as they parti-gyled them all together.

Their main brand was London Stout, which came in both draught and bottled form. Costing, respectively, 7d and 8d per pint in the public bar. (If you bought a crate of four quart bottles, the price was just 7.5d per pint.) At least at the outbreak of war. Tax increases soon pushed that price upwards.

Some brewers, such as Barclay Perkins heavily primed their Stouts, raising the effective OG by as much as 3º or 4º. Whitbread didn’t record primings in their brewing records, but, by cross-referencing with analyses of the finished beers, it appears they didn’t prime their Stouts, not even the draught version.

As was typical, the OG was eroded in the first half of the war and was stable for the remainder. Though, at just 3.5% ABV, it wasn’t very “stout” for the latter part of the war.

You can see the impact of government-dictated reductions in hop usage which kicked in during 1941. By the end of the war, with restrictions loosened, the hopping rate bounced back a little. The effect is also seen in the calculated IBUs. But remember that it’s just my calculation, not a measured value. Add the extra uncertainty of having to factor in the age of the hops and it’s even more of a guesstimate.

The colour paled across the war, simply due to the reduction in gravity and hence the quantity of malt employed.



Whitbread London Stout 1939 - 1945


Date
Year
OG
FG
ABV
App. Atten-uation
lbs hops/ qtr
hops lb/brl
calc. IBU
colour (EBC)
Pitch temp


8th Aug
1939
1046.9
1013.0
4.48
72.28%
6.89
1.28
31
330
62º


9th Sep
1940
1043.4
1012.5
4.09
71.20%
6.90
1.27
29
320
62º


22nd Sep
1941
1042.0
1011.5
4.03
72.62%
5.57
1.02
21
300
62º


4th Aug
1942
1038.7
1011.0
3.66
71.58%
6.64
1.11
23
330
62º


31st May
1943
1039.6
1012.5
3.59
68.43%
6.28
1.11
23
285
64º


22nd Sep
1944
1039.8
1013.5
3.48
66.08%
6.55
1.15
23
250
64º


19th Sep
1945
1039.2
1012.5
3.53
68.11%
6.14
1.09
23
285
64º


Sources:


Whitbread brewing records held at the London Metropolitan Archives, document numbers LMA/4453/D/09/126, LMA/4453/D/09/127, LMA/4453/D/09/128 and LMA/4453/D/09/129.




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