The turbines developed a total of 34,000 shaft horsepower (25,000 kW) and were intended to give a maximum speed of 35.5 knots (65.7 km/h; 40.9 mph).

[2] The ships carried enough fuel oil to give them a range of 5,500 nautical miles (10,200 km; 6,300 mi) at 15 knots (28 km/h; 17 mph).

[5] Isis, named for the Egyptian goddess, was laid down by the Yarrow and Company, at Scotstoun in Glasgow on 6 February 1936, launched on 12 November 1936 and commissioned on 2 June 1937.

On 19 February 1943 she and the escort destroyer HMS Hursley and a Vickers Wellington medium bomber attacked and sank the German submarine U-562 in the Mediterranean Sea north-east of Benghazi.

Isis struck a mine and sank on 20 July 1944 at the position 49°27′N 0°41′W / 49.450°N 0.683°W / 49.450; -0.683 in channel 'T' off the western sector of the Normandy landing beaches.