The Nutshell (Bury St Edmunds pub) reference article from the English Wikipedia on 24-Apr-2004
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Nutshell (Bury St Edmunds pub)

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The Nutshell in Bury St Edmunds in Suffolk, England is thought to be the smallest pub in Britain, although there are rival claims to the title. Whatever the merits or demerits of its claim, the pub is certainly diminutive, there being very little room for more than one or two customers to drink at any one time.