1. Nude Espresso, W1.
A micro-roastery, with two locations (one in Soho, one in Brick Lane). Nude know their coffee. Find out more here.
2. Store Street Espresso, WC1.
Serving Square Mile and other guest coffees, Store Street Espresso is just the ticket. They've also recently opened a second cafe in Tavistock Place. Find out more here.
3. Algerian Coffee Stores, W1.
Algerian Coffee Stores has been trading for over 120 years. That's 120 years of good, good coffee. Find out more here.
4. Timberyard, WC2.
With two locations - one in Old St and a new one in Seven Dials, Timberyard's lure is now twice as strong. Find out more here.
5. Flat White, W1.
Bringing coffee culture from New Zealand and Australia, Flat White serves, well, the perfect flat white. Find out more here.
6. Dunne Frankowski at Sharps, W1.
A coffee installation in a barbers shop would sound weird, if Dunne Frankowski hadn't already proved their coffee cred with their previous shop - Protein. Sit at the bar, and settle in. Find out more here.
7. Monmouth Coffee, WC2.
Beans, glorious beans. You'll have to get up early to take a seat in the Monmouth St branch, but the take-away tastes just as good. Find out more here.
8. The Proud Archivist, N1.
Serving Caravan coffee by the canal, the Proud Archivist is airy, sunny and delightful. Find out more here.
9. Fingers Crossed, N16.
Fingers Crossed is small but mighty, and serves punchy coffee alongside whopper sandwiches. Find out more here.
11. Look Mum No Hands, EC1.
Providing coffee and bikes, Look Mum No Hands! serves Square Mile coffee mostly, but with guest blends too. Find out more here.
12. Long White Cloud, E2.
Located conveniently near Broadway Market and Columbia Road Flower Market, Long White Cloud sells dreamy flat whites, as well as spot-on iced coffee. Find out more here.
13. Caravan, EC1.
Roasting and serving responsibly sourced coffee, Caravan is a dream. Find out more here.
15. Giddy Up, EC1.
Serving Square Mile coffee, this concession in Fortune Park is perfect in the sunshine. Find out more here.
17. Department of Coffee and Social Affairs, EC1.
Located about 100 yards away from Prufrock, the DOCASA is spacious and serves a consistently good brew. Find out more here.
18. Flat Cap, SW1.
Serving coffee from a cart in Victoria, and in Borough Market, it's reliably good. Find out more here.
19. Waiting Room, SE8.
This Deptford cafe is three years old this year. Here's to many more. Find out more here.
21. Blacksmiths Coffee, SE1.
Literally a little hatch in the wall, Blacksmiths is open 8am until midday, Monday to Friday. And they serve donuts too. Find out more here.
22. Federation Coffee, SW9.
Located in Brixton Village, Federation is just the job for a caffeine hit after a morning of nibbling your way around the other venues in the market. Find out more here.
23. Lowry & Baker, W10.
Serving Monmouth coffee, this spot has quickly become a Notting Hill staple. Find out more here.
24. The Elgin, Maida Vale, W9.
Worth the trip to Maida Vale, the Elgin serves Coleman coffee with style. Find out more here.
25. Talkhouse, W11
With a straightforward menu (espresso, or espresso with milk), Talkhouse is a coffee shop that loves coffee. Find out more here.
PS: You can also check out this useful London coffee map.