It is a very regional thing - I would say that A.m.m. is generally found more in coastal north Wales, northern England (especially the north-east) and Scotland. Ireland is almost completely A.m.m. in Eire, but there has been some introgression of other races in Ulster - although there is now a strong movement there to get back to the native bee. 
 


I think the Manx bee is also AMM, and I think that there are some in West Cornwall. Mine in N. Cornwall look like AMM but I haven't done a proper test to confirm.

Chris

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