Found at the hearts of London’s Spitalfields Market and Seven Dials Market, Yum Bun offers the English capital the best in feel-good Japanese tastes, having launched over a decade ago as the city’s first steamed bun vendor. Based across LA, London and Lisbon, design studio How&How took on the challenge to rebrand London’s first streetside bao bar, resulting in an identity as light, playful and enticing as the buns themselves, epitomising the eatery’s role in shaping the capital’s…