Half Million Café

Sitting right on Oxford Street where Mayfair meets Soho, this coffee shop keeps unusually generous hours, opening at 8am and staying open until 10 or 11pm depending on the day. A 4.5-star rating from more than 1,900 reviews suggests it holds its own in this busy patch of central London, and with takeaway and delivery both on offer, it slots easily into a full day out.