The Cambridge Beer Festival is back – and this year’s event is extra special, as it is the 50th anniversary. The Camra (Campaign for Real Ale) festival, which has set up shop on Jesus Green, opened on Monday (20 May) and runs until Saturday (25 May). There are more than 200 British real ales and 80 ciders and perries on offer. Anthony Mobbs, festival organiser, revealed that two of the most popular ales on the first day were Oakham’s Citra Haze and Spiral Stout by Boudicca Brewing. He noted that around 4,000 people came on the first day alone and estimates that by the end of Saturday, nearly 4…