Two more sloops were authorised in the 1942 Programme; the names would have been "Waterhen" and "Wryneck" but they were never ordered in that year's Programme. The 1944 Programme re-instated these two vessels, as well as the twelfth sloop authorised under the 1941 Programme, and now named as "Partridge". These three ships were ordered on 9 October 1944, but they were all cancelled on 15 October 1945. These had been intended to be further modified and enlarged, with a beam of . Two further ships planned under the 1944 Programme would have been named "Woodpecker" (ii) and "Wild Swan", but these were never ordered and the intention to build was dropped when the 1945 Programme was compiled.