We're at about 900ft here, in North Wales and there isn't much of anything that I can see. There's some heather about 2 miles away but I don't think they've found it. However, the village is about a mile and a half away and its several degrees warmer down there. Somebody must have Dahlias on the go.
Fascinating.
You have to dilute your honey then centrifuge or sediment the pollen out. Staining helps then look with a fairly powerful microscope
If Ruary is about he's the microscopy expert.
I've just treated myself to Pollen identification for beekeepers from Northern Bee Books.