In the last decade or so, microbreweries and home brewers have recreated historic beers using recipes found in brewery archives, as have some bigger brewers.
I'm a fan of Fuller's cask and bottle-conditioned beers, especially ESB and 1845, and have enjoyed XX, Double Stout and Old Burton Extra from the Past Masters range brewed in collaboration with Ron Pattinson of Shut Up About Barclay Perkins. Some historic beers are now being revived in the North West.
Boak and Bailey report on the reappearance after forty-six years of beers from the Bolton brewery Magee and Marshall, whose brand names someone has bought the rights to, and next month, as part of Manchester Beer Week, the Smithfield Market Tavern will host the launch of four historic beers, including a 1903 XXX, a 1951 "C" Ale and a 1952 Stout from the brewing records of Middleton brewery J.W. Lees, an event at which Ron will be speaking. I'll be going and am looking forward to trying beers my (great-)grandfathers might have drunk.