London's sandwich scene has a new talking point. Maddy's, the popular sandwich shop in Mayfair, has teamed up with Berenjak — the Persian grill restaurant loved for its kababs — for a limited collaboration that blends the two formats: proper sandwiches built with Persian flavours.

If you haven't been following, here's the background. Maddy's has built a reputation as one of the more serious sandwich operations in central London, drawing queues for generously filled, well-sourced creations. Berenjak, from the team behind the Hoppers group, brought Iranian street food to Soho and then Kensington, with charcoal-grilled kababs, fresh-baked bread and the kind of smoky, juicy fillings that translate perfectly to handheld form. It's a natural pairing: one side knows bread and build, the other knows the filling.

Details like exact pricing and how long the collaboration runs for aren't fully available from the announcement, so the sensible advice is to check both restaurants' social channels or websites before making a special trip — pop-up collabs in London can sell out by mid-afternoon, especially on weekends.

Why bother? Because this is exactly the kind of one-off that makes a London food trip worth planning around. A quick lunch in Mayfair followed by a wander through Mount Street's shops or a stroll toward Hyde Park is a very pleasant way to spend an afternoon, and you're eating something you genuinely can't get at either restaurant's usual menu. For visitors, it's also a low-commitment way to sample one of London's most praised Persian restaurants without committing to a full dinner booking.

Worth knowing if you're going: Mayfair is easy to reach via Bond Street or Green Park tube stations, and the area around Maddy's is packed with other good stops for coffee or a drink afterwards. If the collab has ended by the time you visit, Berenjak's Soho site remains one of the best-value big-flavour meals in central London — book ahead, as tables go quickly.

This one is for travellers who plan city breaks around food, and locals who treat lunch as the main event. Keep an eye on both names — collabs like this tend to be a preview of what these kitchens do next.