Hawthorn is anciently sacred and comes down to us in folklore as the Famous Flower with multiple significances, not least of which is the blossom, the fragrance of which is the olfactory simulacra of female sexuality, hence its associations and sacredness*. The ancient Druidic significance of mistletoe (told to be a Pictish Shaman in Edinburgh in 1985) is that the milky berries were anciently considered to be the Semen of the Lord of the Forrest, the Horned One himself, sometimes known as Herne, as Lugh, as Robin, or just plain old Cernunnos. To find such a hemi-parasite growing in such a place would be considered very powerful magic indeed. Perhaps Sir Cliff's wine is Hawthorn Berry, a popular tipple amongst Hedge Witches and other Nature Worshippers.   


* Does, I wonder, the mid-winter blossoming Glastonbury Thorn possess this quality I wonder? If so then its traditional presence on Our Majesty's Xmas dinner table must give the male royals something to sniff about.