Crosstown Cannon Street - Doughnuts, Cookies, & Coffee

Steps from St Paul's, this Crosstown outpost brings its signature doughnuts to the City of London, alongside cookies, coffee, chocolate, ice cream and other sweet treats. Hours are strictly weekday — 7.30am to 5.30pm, Monday to Friday — making it very much a midweek indulgence rather than a weekend stop, and a 4.5-star rating from nearly 200 reviewers suggests it's doing plenty right.