Either grandfathered (I signed up in 2019) or it might've been a new change - I left the UK last year so if it was introduced last year, that would make sense.

Either grandfathered (I signed up in 2019) or it might've been a new change - I left the UK last year so if it was introduced last year, that would make sense. Good to know though, so I don't keep saying "oh yeah it was free".