Origin Coffee is a Cornwall roastery. At Scoresby Street, that means named single origins on the menu, a rotating filter programme, and baristas who know the sourcing story behind every cup.

The arch under Flat Iron Square is a working roastery, and the coffee tastes like it. House-roasted Colombian single origins, with staff who treat the bean selection as part of the service.

Several pour-overs, staff who understand the bean differences, and a room designed around nothing but the coffee.

Birds Hill roasts on-site, sells retail bags at the counter, and the owner knows the full chain from farm to cup. For South Bank, that's not the standard.

Filter coffee and retail drip bags behind the counter on Southwark Street. The flat white's milk work is the tell.

Under Waterloo Bridge with the Thames on the doorstep. The cortado is consistently well made, and the sourcing choices tell you this isn't running on location alone.

Caravan-roasted espresso in the Oxo Tower Wharf, with inventive doughnuts that earn equal billing. Both halves are worth ordering.

An owner-roaster on Lower Marsh, running Colombian single-origin through an espresso machine with a cat for company. The bar programme runs alongside without apology.

A bakery on Lower Marsh where Coleman Coffee Roasters beans sit behind genuinely good pastries and sandwiches. Independent on a stretch that mostly runs on tourist trade.