I for one am certainly not denying they exist, but importing virgins and getting open matings in areas flooded with drones from Hawaii/New Zealand/Greece/Slovenia etc is a complete waste of time and effort.
There are far too many imports to make AMM sustainable in vast areas of England and probably the whole of the UK. On isolated island sites, or in remote valleys you might be slightly luckier, but 85 quid on a queen (from the link above) is IMHO a waste of money and will do nothing to expand the range of AMM in the area of the purchaser. Also with II, and a limited gene pool at the source, buying in say a couple of dozen queens and flooding your local area with AMM drones will in all probability achieve nothing long term but lighten your pocket and weigh down that of the supplier, not because the matings will be bad, but because of the continual dilution of the gene pool with 'unwanted' outsiders.
For the vast majority, regardless of urban or rural location, local mongrels, are almost inevitably the only way forward unless we stop all imports of none native strains.