The period of interest being 18 to 27 May, the escort for WS 8B is as follows: https://www.naval-history.net/xAH-WSConvoys04-1941A.htm
CA:
HMS Exeter (York-class, 6 x 8", 6 x 21" TT))
CL:
HMS Cairo (C-class, AA conversion, 8 x 4", no TT)
DD:
HMS Cossack (Tribal-class, 6 x 4.7", 2 x 4", 4 x 21"...