CAM ship Sea Hurricane serials – Empire Darwin?

On 28 July 1943 the CAM ships Empire Darwin and Empire Tide defended convoy SL133 from Fw200s. The battle is described in a number of books: Empire Tide’s Sea Hurricane was Z4866. Does anyone know the serial of the one from the Empire Darwin?

This is because of a photo, probably of Z4934, on one of these ships in Casablanca prior to the convoy. Z4934 however has a later history. http://members.boardhost.com/Warship/