Tap 193 is an impressive coffee shop. If there was a checklist of things a coffee shop should do well, Tap would ace all categories. Great food (Fresh sandwiches, salads and sweet treats), great coffee, comfortable seating with natural light, non-fussy branding, reasonable prices and the scent of well roasted beans on site.
A case of KISS (keep it simple stupid) being all you really need.
This is one of the few places in London that will do a pour over.