Wuchak
Winsome Lynne Frederick is stalked by an obsessed man on the ugly side of London
A famous young figure skater in London (Frederick) marries an older guy (John Leyton), but soon discerns shes being stalked by some grim tall man (Jack Watson). Stephanie Beacham is on hand as a friend while John Fraser plays a psychiatrist.
Schizo (1976) is a British slasher that predates both "Halloween" and Lynn-Holly Johnsons Ice Castles by two years. I mention the latter because of the skating element, which is only prominent in the opening.
People mistakenly think the slasher started with Halloween, but there were several films that preceded it, starting with "Psycho" (1960) and followed by "Dementia 13" (1963), A Bay of Blood (1971), "Sile...