Cairnes Single Stout sugars 1914 - 1923

Moving on to the sugars, this is where Fullers and Cairnes really diverge. At the start of the war, Cairnes Single Stout had a little under 9% sugar, in the form of glucose. In 1916, that disappears in 1916, and for the rest of the war there’s no sugar at all. Sugar does reappear in 1920, but only in the form of caramel.

Things at Fullers were way, way more complicated. Over the war years, they employed seven different types of sugar. Though in any single brew there were never more than three.

The most popular sugars were glucose and something called Special Dark. I’m guessing that the latter was some sort of dark invert sugar. The quantity used was pretty high at the start and the end of the period covered by the table. I assume restrictions on the supply of sugar was responsible for the drastic reduction in the quantity during the war years.

At Fullers, the proportion of sugar in the grist was far higher than at Cairnes. Starting at over 25%. Even in the most difficult later war years, the amount never fell lower than 6.5%. And for most of the time was well over 10%.

Fullers also used way more caramel, varying between 3% and 7.5%. While at Cairnes it went from zero to a maximum of 2%.

While at Cairnes, even at the start of the war, sugar was less than 10% of the grist. From 1916 on, that was reduced to zero. And, other than caramel, no sugar was used after WW I. 

Cairnes Single Stout grists 1914 - 1923
Date	Year	pale malt	roast barley	flaked maize	glucose	caramel
1st Jan	1914	74.45%	6.50%	9.93%	8.82%	0.30%
1st Sep	1914	70.03%	7.74%	13.34%	8.89%
7th Jan	1915	71.37%	7.22%	12.69%	8.72%
2nd Oct	1916	79.62%	7.11%	13.27%
3rd May	1917	79.62%	7.11%	13.27%
7th Jun	1917	87.83%	6.84%	5.32%
1st Nov	1917	87.83%	6.84%	5.32%
3rd Jan	1918	86.70%	6.88%	6.42%
2nd May	1918	91.17%	6.74%	2.10%
3rd Oct	1918	93.33%	6.67%
3rd Feb	1919	93.33%	6.67%
2nd Oct	1919	85.42%	7.46%	7.12%
1st Jan	1920	89.05%	7.66%	3.30%
15th Apr	1920	87.33%	7.37%	5.29%
4th Oct	1920	81.76%	8.54%	9.28%		0.41%
3rd Oct	1921	95.33%	3.91%			0.76%
2nd Feb	1922	76.04%	10.18%	12.64%		1.13%
1st Jan	1923	89.36%	8.51%			2.13%
Sources:
Cairnes brewing records held at the Guinness archives, document numbers GDB/SUB/0022 and GDB/BR17/1257.

Fullers Porter sugars 1914 - 1925
Date	Year	glucose	invert	Special Dark	cane sugar	Dark Trivert	Porteris	caramel	total sugar
18th Nov	1914	11.34%		12.60%				3.30%	27.25%
17th Feb	1915	3.83%				9.56%		2.91%	16.30%
2nd Jun	1916						15.84%	6.15%	21.99%
4th Aug	1916			4.90%				3.85%	8.75%
12th Apr	1917	3.44%		6.89%				3.59%	13.92%
9th Aug	1917			1.25%	1.25%			3.92%	6.42%
5th Jan	1918			2.35%	2.35%			3.69%	8.39%
19th Apr	1918	8.59%		4.30%	8.59%			4.42%	25.90%
14th Jan	1919	5.69%	5.69%					7.57%	18.94%
10th Feb	1920				6.92%			4.89%	11.81%
16th Jun	1925			13.50%				4.80%	18.31%
Source:
Fullers brewing records held at the brewery.