Vanessa, (the Irish Honey Queen) has now analysed the sample of my honey that she says is the best she has ever tasted, having citrus overtones. The main sources of pollen are Privet and unidentified Compositae. I suggested dandelion but she says the pollen, although similar, is too small for that.
Privet honey is said (by Howes) to be dark and bitter tasting. The honey had neither of those attributes, but the frequency of a particular pollen in a honey isn’t directly related to the quantity of nectar from the same plants. I have had customers referring to citrus overtones in Ivy honey but I think was too early in the year for ivy to be coming in.