Coffee roaster££hackneyTrade only at roastery (online retail)
Anette Moldvaer and James Hoffmann's Square Mile coffee roastery near Wenlock Basin in north London, founded 2008, the city's most-cited specialty roaster.
Tip: No public cafe; the beans go to subscribers and the city's top espresso bars (Workshop, Prufrock, Kaffeine).
Sources from: Ethiopia, Colombia, Brazil, Kenya, Costa Rica
How they serve: Espresso, Filter, Whole bean retail, Subscription
Coffee roaster££brixton-tootingDoor Coffee Bar Mon-Fri 07:30-15:30Public cafe
Assembly Coffee's specialty roastery inside a 19th-century Brixton fire station in south London, founded 2015, runs a Loring roaster, sensory lab.
Tip: The Door Coffee Bar runs weekdays only. Cuppings at the roastery book through their site; subscription ships UK addresses weekly.
Sources from: Ethiopia, Colombia, Kenya, Costa Rica
How they serve: Espresso, Filter, Whole bean retail, Subscription
Coffee roaster££boroughMon-Sat 08:00-18:00Public cafe
Anita Le Roy's pioneer London coffee roaster, founded in 1978 on Monmouth Street in Covent Garden, runs two retail-and-cafe sites and is one.
Tip: The Covent Garden original on 27 Monmouth Street has the standing counter; Borough has more outdoor seats.
Sources from: Ethiopia, Guatemala, Colombia, Brazil
How they serve: Espresso, Filter, Whole bean retail
Coffee roaster££hackneyCafe Mon-Sun 08:00-17:00Public cafe
Daniel Climpson's roaster on Broadway Market in Hackney London, founded 2002, runs a Saturday-market cafe at 67 Broadway and a roastery on Helmsley Place.
Tip: The Saturday market is the canonical visit. Climpson's Arch on Helmsley Place is a Friday-Saturday-only railway-arch bar.
Sources from: Brazil, Ethiopia, Colombia, El Salvador
How they serve: Espresso, Filter, Whole bean retail, Subscription
Coffee roaster££shoreditchCafe Mon-Fri 07:30-17:00, Sat-Sun 09:00-17:00Public cafe
Michael Allpress's New Zealand-founded specialty roaster, opened in London on Redchurch Street in Shoreditch in 2010, runs cafes across east London.
Tip: The Redchurch Street original sits next to Brat. Their Dalston site has the bigger laptop seating area.
Sources from: Brazil, Honduras, Ethiopia, Colombia
How they serve: Espresso, Filter, Whole bean retail
Coffee roaster££shoreditchCafe Mon-Fri 07:30-17:00, Sat-Sun 08:30-17:00Public cafe
Tom Sobey's Cornwall-founded Origin Coffee, roasting in Helston since 2004, opened the Charlotte Road London cafe in 2015 and runs a third-wave filter bar.
Tip: The retail wholesale relationship runs to many of Soho and Clerkenwell's morning coffee bars.
Sources from: Ethiopia, Colombia, Brazil, Kenya, Costa Rica
How they serve: Espresso, Filter, Whole bean retail, Subscription