I've just been going through my photos of some of the documents other than brewing records I've photographed. Mostly to use some of the images in tweets. One as notebook from someone called R.W.R. Laws. He must have worked on the brewing staff at Barclay Perkins, because the notebooks loose lesaf pages are filled with information about brewing. But also about specific types of beer. For example, IBS, also known as Russian Stout.
But I was stopped dead in my tracks when I got to this page. It has analyses of Lagers, both British and foreign, from WW I.
How on earth had I never transcribed the details into my spreadsheets? It's full of useful information and encompasses three of my obsessions: British Lager, WW I and Scotland. It would be hard to think of something more down my street.
I knew Barclay Perkins had experimented with brewing Lager during the war. Presuambly because of an interruption in supplies from Germany and the Austro-Hungarian Empire. Nice little business opportunity there. I also knew that Lager was brewed at Allsopp, the Wrexham Lager Brewery, Jeffreys and J & R Tennent (in the notebook incorrectly spelled as Tennant). But I didn't realise Peter Walker was brewing it at such an early date.
As you can see, the examples are plenty much split down the middle between Pilsener and Munich-style Dark Lager. It's only really after WW II that Lager came to associated with the pale colour of Pilsener. Before then, various shaded of Lager were both sold and brewed in the UK.
Anyway, here's the information in handy table form:
|Lagers during WW I|
|28th Jan||1915||Peter Walker||UK||Pilsener||Pilsener||bottled||1010.3||1044.4||4.43||76.80%|
|28th Jan||1915||Tennent||UK - Scotland||Munich||Münchner||bottled||1015.3||1049.2||4.39||68.90%|
|1st Feb||1915||Salamon||UK||Non-alcoholic Lager||Lager||bottled||1027.5||1038.5||1.06||28.57%|
|17th Mar||1915||Wrexham Lager Brewery||UK||Pilsener||Pilsener||bottled||1013.9||1051.3||4.86||72.90%|
|12th May||1915||Jeffrey & Co||UK - Scotland||Pilsener||Pilsener||bottled||1009.8||1039.9||3.85||75.44%|
|12th May||1915||Jeffrey & Co||UK - Scotland||Munich||Münchner||bottled||1012.1||1041.3||3.71||70.70%|
|26th May||1915||Barclay Perkins||UK||Pilsener experimental||Pilsener||bottled||1008.4||1050.8||5.25||83.46%|
|26th May||1915||Barclay Perkins||UK||Munich experimental||Münchner||bottled||1020.2||1051.6||4.00||60.85%|
|26th May||1915||Tennent||UK - Scotland||Pilsener||Pilsener||bottled||1010.3||1047||4.73||78.09%|
|26th May||1915||Tennent||UK - Scotland||Munich||Münchner||bottled||1015.6||1050.4||4.51||69.05%|
|26th May||1915||Peter Walker||UK||Munich||Münchner||bottled||1013.2||1048.7||4.59||72.90%|
|26th May||1915||Carlsberg||Denmark||Light Lager||Lager||bottled||1014||1053.6||5.10||73.88%|
|26th May||1915||Barclay Perkins||UK||Dark pasteurised||Münchner||bottled||1019.9||1051.9||4.15||61.66%|
|26th May||1915||Barclay Perkins||UK||Dark not pasteurised||Münchner||bottled||1019.8||1051.6||4.08||61.63%|
|26th May||1915||Barclay Perkins||UK||Light pasteurised||Lager||bottled||1011.8||1051.5||5.10||77.09%|
|26th May||1915||Barclay Perkins||UK||Light not pasteurised||Lager||bottled||1010.5||1051.2||5.25||79.49%|
|4th Jul||1915||F.W. Lyckholm, Gothenburg||Sweden||Red Label||Lager||bottled||0.048||1009.4||1047.5||4.95||80.21%|
|4th Jul||1915||F.W. Lyckholm, Gothenburg||Sweden||Blue Label||Lager||bottled||0.048||1012.6||1050.5||4.90||75.05%|
|20th Aug||1915||Anheuser Busch, St. Louis||USA||Budweiser||Lager||bottled||1015.9||1050.5||4.46||68.51%|
|Notebook held at the London Metropolitan Archives, document number ACC/2305/01/712.|
Note that most have a gravity between 1048º and 1050º, which for a Pilsener is on the high side. While for a Münchner, it's a little low.
I'd wondered when Barclay Perkins stopped experimenting and started selling their Lager. I's suspected that it wasn't until they had completed their Lager brewery in the 1920's. But that wasn't the case. BEcause the notebook also has Lager sales figures for 1919.