When I started my engineering degree at Cambridge in 1968 we were the first year that used the metric SI system instead of imperial measurements. That was over half a century ago.
No need to sign up. It’s free-to-air.
https://www.bt.com/sport/football/champions-league/bt-sport-to-show-free-to-air-uefa-champions-league-europa-league-final
On the same note, why are we still having to book an 'appointment' when we want to visit our local Council Tip? And why can't I book a visit for the same day?