Vegan and Vegetarian are on the menu, but the same kitchen also prepares what you avoid, so cross-contamination is possible. Tell staff what you react to, and ask how your dish is prepared before you order.
A fish and chip stall in Spitalfields Market on Lamb Street. The site describes this second Wicked Fish site as 100% dedicated gluten free, with its own gluten free batter, and the menu marks vegan sides.