Chef-level fillings, queues down the street, big on TikTok: Britain’s new sandwich boom

Chef-level fillings, queues down the street, big on TikTok: Britain’s new sandwich boom
Deluxe, restaurant-quality sandwiches have become a national obsession. Here’s why tuna mayo will never be the same again
It’s a weekday lunchtime and about 30 people, mostly millennials in fashionable hiking trainers, are milling around in an alleyway…