sentences:  Escort Group B2 was one of seven British escort groups which served with the Mid-Ocean Escort Force (MOEF), which provided convoy protection in the most dangerous midsection of the North Atlantic route.The group was formed in the spring of 1942 and originally consisted of the "Havant"-class destroyer as group leader with the "Leamington", V-class destroyer , and the s , , and .Later in the year the low-endurance destroyers "Leamington" and "Veteran" were replaced by longer-ranged V and W-class destroyers and and the Flower-class corvettes , , and joined the group.