Re: So will UK viewers notice more of a difference with the Blurays...
The only problem with NTSC and 24fps material is 3:2 pulldown, causing "juddering" which is highly noticeable to me - all praise Blu-ray (and capable monitor) for true 24hz support. Having said that, all my Star Trek DVD's are the imported US versions, I'd go with juddering over PAL speed-up every time. I'm not certain, but I think the speeding up equates to something like a semitone raise in pitch on the soundtrack.
YOU MONOTONE HUMANS ARE ALL ALIKE... FIRST YOU CONDEMN, THEN ATTACK.