The tuna mayo from Secret Sandwich Shop is a triumph of layering, and ratios of filling.

The tuna mayo from Secret Sandwich Shop is a triumph of layering, and ratios of filling.

Photographer: Emli Bendixen for Bloomberg Pursuits

Dining Guide

These Are the Best Sandwiches Around London, as Picked by Top Chefs

Whether you’re in the mood for an artisanal, slow-roasted pork masterpiece or a £3 supermarket staple, these are all worth seeking out.

Sandwiches might be a staple worldwide, but nowhere are they so enshrined in daily diets as in the UK. They’re such a desk lunch constant for Brits that in May 2021, Bloomberg launched the Pret Index to track back-to-work activity in London (and a handful of other international cities).

Before the Covid-19 pandemic, the British Sandwich & Food to Go Association estimated the country’s sandwich industry to be worth £8 billion ($10.2 billion). In the first half of 2023, the figure fell to around £6.8 billion, a 15% decrease. (The UK’s definition of a sandwich is stricter than in some places. Whereas New York State’s Department of Taxation considers a buttered roll a sandwich, the British group decrees that a sandwich is “any form of bread, with a filling.”)