No doubt you're all familiar with the horrors the First World War inflicted on British beer. If for some reason this fascinating subject is not something you're familiar with then you really need to head over to Ron's blog.
Suitably informed I'm sure you'll soon be pondering "what happened to hop growing during the war then?". Well ponder no more as I've a snippet that answers that question:
"In 1917, owing to wartime conditions, brewing was drastically restricted and the possibility of a large surplus of hops was forseen by hop growers and traders. At their request the Government ordered a reduction in the amount of land under hops to half the 1914 acreage. Later in the same year the Government formulated a scheme of Hop Control which was in force until 1925."
AH Burgess "Hops" pp 13-14
There is more later on in the book, which I may return to if I get a moment.