Global,
You were asking about "hunter killer" groups last week. That is more of an American term. The British had Support Groups:
March 1943
1st SG - 1 sloop, 5 frigates
2nd SG - 7 sloops
3rd SG - 5 destroyers
4th SG - 5 detroyers
5th SG - 1 escort-carrier, 2 destroyers
6th SG - 1 Bogue, 2 destroyers (this was an American group, the others were all British).
By July 1943 there were 12 such groups in the Atlantic (the above plus 7th, 21st, 37th, 38th, 39th and 40th).
As you are aware these groups took the war to the Uboots, and combined with new technology (and improved use of the technology) with the qualitative decline of Uboot personnel turned the tide.
Regards,
Malcolm
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