by breweries and only allowed to offer the owning brewery's beers ("the tie"). CAMRA also campaigned against the tendency of smaller brewers to be bought up by larger ones, against short measures, for the preservation of historically significant pubs, and for increased choice and longer opening hours for pubs. CAMRA also produced a Good Beer Guide and campaigned for the preservation of mild ale, which was now seen as an endangered style. English drinkers became more interested in imported beers during the 1970s and 1980s, partly as a result of increased foreign travel and partly because of promotion of the subject by beer writers such as Michael Jackson, with his 1977 The World Guide to Beer. Newly popular foreign brands included Beck's from Germany, Heineken and Grolsch from the Netherlands, Leffe and Hoegaarden from Belgium, Peroni from Italy, San Miguel from the Philippines, Budweiser and Sierra Nevada from the US and Corona Extra from Mexico. A number of bars specialise in imported beer, with food and decor to match, Belgian and Bavarian themes being the most common. In 1972, Martin Sykes established Selby Brewery as the first new independent brewing company in England for 50 years. "I foresaw the revival in real ale, and got in early", he said. By the end of the decade he was joined by over 25 new microbreweries, a trend which would only increase in the 1980s. In 1979, Tim Martin opened the first Wetherspoons pub, in Muswell Hill, north London. This was the basis of a national chain of pubs, (over 900 as of 2016) which were to prove influential on the British beer scene, because of their low prices, large premises, and championing of cask ale. Also in 1979 David Bruce established the first "Firkin" brewpub. The Firkin chain consisted of pubs offering cask ale brewed on the premises, or at another brewpub in the chain. The chain expanded to more than 100 pubs over its twenty-year history, considerably adding to the number of brewpubs in England. After a number of changes of ownership, brewing operations were wound up in 2001. Two pieces of legislation, known as The Beer Orders, were introduced in December 1989, partly in response to CAMRA campaigning. The Orders restricted the number of tied pubs that could be owned by large brewery groups in the United Kingdom to 2,000, and required large brewer landlords to allow a guest ale