Scuba Diving Letchworth Garden City, Stevenage - Welcome to the Letchworth Garden City Scuba Diving Directory listing recommended scuba diving companies in Letchworth Garden City. It lists those who offer scuba diving lessons and scuba diving in Letchworth Garden City, Stevenage. Do you have a Letchworth Garden City business? If so, why not advertise it on the Letchworth Garden City Business Directory - IT'S FREE.