Changes to UK labelling regulations mean that pubs are required to provide allergen advice to customers from 13th December 2014. This advice must be provided by pubs for all non pre-packaged food and drinks including cask ale.
Allergen advice can be on printed lists, signs or available when requested by a customer. Please follow this link to see the advice for pubs on the BBPA website . You can download and print this PDF as it provides a checklist for licensees on what you need to provide to customers, please remember that it is a legal requirement to be able to provide this information from the 13th December.
You can also find further information on the Food Standards Agency website.