I've noticed a creeping return of non-metric units in UK TV too. From scientists who should know better.
I don't mind miles so much - since our roads are (and will always be) marked in miles. But some of the other units ... inches, pints, pounds. No thank you.
I am 53, and know for a fact that no one younger than me would have used imperial as part of their UK education, and anyone who does is doing it as an affectation. Like that twat Jacob Rees Mogg.