I've just picked up a second-hand copy of The Beer Drinker's Companion, Frank Baillie's 1974 survey of British beer and brewing.
I was inspired to look out for it by a reading list on Boak and Bailey's blog as it was pretty much the only book there that I hadn't got.
Some of the things he mentions about the storing and serving of beer ( (metal v wooden casks, gravity or hand-pumps v electric dispense, cellar conditioning v bright, top pressure or container tank beer) aren't really issues now; others, like serving temperature and cloudiness, clearly still are.
One of the things that stands out is bottled beer. Bottle-conditioned beers are now, he says, "very few" (Guinness Extra Stout and Worthington White Shield being the only nationally available ones), compared to the hundreds you can buy today. On the other hand, the number of bottled beers in pubs has dropped. In 1974, according to Baillie, my local brewery, Robinsons in Stockport, produced not only the bottled pale and strong ale they still sell but also a bottled stout and a light and a brown ale. I think this has to do with the decline in mixing bottled and draught beer that I remember from my early pub-going days in the late 80's.