Hi Rob,
I'm afraid the news isn't good for you.
"24: Day 6" is unlikely to be repeated anytime soon. In fact, even Sky 3 viewers have yet to see "Day 5", so the chance of seeing "Day 6" within the next 12 months, is practically nill, as the DVD release will already have been out a fair while by then!
"Lost" Season 3 is due to start being shown on Sky 3, later this year, probably starting around June or July 2007. That's the best chance for you to catch-up with the show.
As for "Prison Break" (Season 2), again, all episodes are shown on Mondays, and repeated late on Friday nights. So, the chances of a complete repeat of all of Season 2, is unlikely. However, Five may do a Catch-Up, like they did with Season 1, over Christmas 2007/New Year 2008. Other than that, though, your only other chance will be when UKTV Gold airs the show, later in the year, albeit in a poor quality 4:3 format, meaning you'll lose a substantial amount of picture information.
If push-comes-to-shove, however, and you're really desperate, PM me directly, regarding Season 2 of "Prison Break" and I
may be able to help you out.
Pooch