I thought I had some numbers somewhere to demonstrate that impact. I did. And I've gathered them up for you, like sticklebacks in a net. The number of breweries in the UK and the Netherlands 1895 to 1930. I knew this stuff would come in handy one day.
First, the Netherlands:
|Dutch breweries by province|
|Nederlands Etiketten Logboek, 1998|
Note the big drop between 1910 and 1920.
Now here's the UK:
|UK breweries 1890 - 1930|
|"Journal of the Institute of Brewing, vol 7", 1901, page 64|
|BBPA Statistical Handbook 2003, p. 92|
|Brewers' Almanack 1955 p.69|
See? Between 1910 and 1920 57% of Dutch breweries closed and only 35% of UK breweries.
Looks to me like WW I was worse for Dutch brewing than British.