Recorded by James Vaughan.
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I'd suggested to James it could well be one of the mining bees, but my bee knoweldge doesn't stretch too far!
They're definitely male Andrena, and - though the details aren't at all clear - I'm inclined to agree with A haemorrhoa. Male haemorrhoa share (though less obviously) the distinctively golden tail of the female, and have clear orange hind tibiae (often with a definite black mark midway). In a case like this it would be all easy to see in the field if you just picked them out of the flower.
Lat/Lng: 55.1073, -3.4184
OS grid ref: NY096801