The sun pours through the smokey windows of this upstairs diner and is intercepted by half a dozen coconut palms, casting exotic shadows on the terrazzo floor. Everything – and I mean everything – is a shade of brown, as it has been since its last refurb a few decades ago.

Have you ever been walking along the street in Madrid and thought to yourself: ‘Quick caña and tortilla?’ Me too. If you happen to have that thought whilst on Calle de Fuencarral, you’re seconds away from making it a reality. But if you’re half way across the city, jump on a metro – it’s worth the ride.

Manuel Moreno de Valle, the owner of Cervecería La Carpa, has fallen asleep on shift again. It’s an unusually hot afternoon and the 69-year-old waiter is perched on a bar stool outside…