Write a review Your name* Your e-mail* (Not for publication) Rating ★★★★★ Excellent ★★★★☆ Very good ★★★☆☆ Average ★★☆☆☆ Poor ★☆☆☆☆ Terrible Your review * * — Required information Diamond Source ← View details 145 - 157 St John Street , London EC1V 4P , England , United Kingdom, London, England EC1V 4P 0800 677 1012