[['name', 'pennant', 'builder', 'laid down', 'launched', 'commissioned'], ['chanticleer', 'u05', 'denny , dunbarton', '6 june 1941', '24 september 1942', '29 march 1943'], ['crane', 'u23', 'denny , dunbarton', '13 june 1941', '9 november 1942', '10 may 1943'], ['cygnet', 'u38', 'cammell laird , birkenhead', '30 august 1941', '28 july 1942', '1 december 1942'], ['kite', 'u87', 'cammell laird , birkenhead', '25 september 1941', '13 october 1942', '1 march 1943'], ['lapwing', 'u62', 'scotts , greenock', '17 december 1941', '16 july 1943', '21 march 1944'], ['lark', 'u11', 'scotts , greenock', '5 may 1942', '28 august 1943', '10 april 1944'], ['magpie', 'u82', 'thornycroft , woolston', '30 december 1941', '24 march 1943', '30 august 1943'], ['peacock', 'u96', 'thornycroft , woolston', '29 november 1942', '11 december 1943', '10 may 1944'], ['pheasant', 'u49', 'yarrow , scotstoun', '17 march 1942', '21 december 1942', '12 may 1943'], ['redpole', 'u69', 'yarrow , scotstoun', '18 may 1942', '25 february 1943', '24 june 1943'], ['snipe', 'u20', 'denny , dunbarton', '21 september 1944', '20 december 1945', '9 september 1946'], ['sparrow', 'u71', 'denny , dunbarton', '30 october 1944', '18 february 1946', '16 december 1946'], ['starling', 'u66', 'fairfield , govan', '21 october 1941', '14 october 1942', '1 april 1943'], ['woodcock', 'u90', 'fairfield , govan', '21 october 1941', '26 november 1942', '29 may 1943']]
7 different Builder built 13 different Black Swan Class Sloop
7 different [ENT] built 13 different [ENT]