Barclay Perkins were one of the first English brewers to get into lager in a big way. Their first experiments were during WW I and by the early 1920's they'd a purpose-built lager plant and were in full production.
The following passage is taken from the speech of chairman Lt. Colonel Robert Wyvill Barclay given at the 41st annual general meeting of Barclay, Perkins & Co. Ltd.
'The new customs duty of £1 per bulk barrel on non-Empire beers is not really such a big thing as it sounds at first. I attracted a certain amount of attention during the debate on the Budget, and I agree with Colonel Gretton, who pointed out that some members were trying to make a mountain out of a molehill. At the same time, we, as brewers or lager beer , do greatly appreciate this action of the government in supporting a British industry, but it is too son as yet to judge what result this new Customs duty will have on the imports of foreign lager beer.
Some of the Members who oppose this increased Customs duty in the House of Commons seem to be under the impression that lager beer cannot be brewed in this country, but we have had expert opinion on this from the Scandinavian Brewers; Laboratory, who say: "Basing our judgment on the results of our investigation, we may consider the quality of the beer as of the highest standard possible, and we may reckon this produce of yours equal to the finest lager beer we know."
That is only one opinion, but we can add to that the opinions of lager beer brewers from all over the world who have visited the brewery at various times.
I should like to back these opinions and ours by inviting those M.P.s to come to the brewery and taste any brand of foreign lager beer obtainable in London they like to name against Barclay's lager. I leave it at that.
I referred to the debate on the Budget just now. Sir Joseph Lamb raise the question of the use of British barley in lager beer. I may be of interest to state that this company have for some time in the past has been experimenting with the making of British barley into lager malt. This has now gone beyond the experimental stage, and I can assure you that the Barclay's lager you drink in this country is made from a large proportion of British malt.
The proportion of British malt has gradually been rising each year as our maltsters have mastered the making of lager malt from British barley, which requires a different process than for making malt for the top fermentation beers.'
"The Brewers' Journal 1936", page 396.
I like the bit where he calls out M.P.s to parallel taste imported lager against Barclay's. I wonder if any turned up at the brewery? There being free drink on offer, I bet some did. You know what a bunch of greedy pissheads politicians are.