The Morning Advertiser (formally "The Publican") is a trade publication aimed at those working in UK public houses. It is a good source of up-to-date news about this sector.
Glasgow University keep the Scottish Brewing Archive, a collection of historical documents relating to the Scottish brewing industry. This PDF gives examples of the types of documents in this collection.
Database of cause and effect 'fishbone' diagrams for brewing and brewing scientist covering practical aspects of malting, brewing, packaging, distribution, etc.