Very good news from the BFI:
"We kick off our autumn slate with the 39th release in the long-standing BFI Flipside strand. Combining two ‘far out’ British films – exploitation director Derek Ford’s Secret Rites and Malcolm Leigh’s Legend of the Witches – the release sees both titles available on Blu-ray for the first time ever. The final set will also feature to-be-announced artwork by renowned illustrator Graham Humphreys, and be launched at a special Halloween event at BFI Southbank."
BFI site
I've seen Legend of the Witches, they're part of that curious "witchcraft in suburbia" craze from the late 1960s/early 1970s, which was basically an excuse for wife swapping and adultery in the minds of the general public, and also the makers of films like those. Fascinating relics!