MacIntyre: World's Toughest Towns
the point to remember is that no one else seems to be showing them, same with virgin 1 (channel 1 if you so wish

) in that they seem to be the only freeview channel with any sort of sci fi what so ever these days in my opinion
Which may also be the reason they aren't getting the viewing figures?
Let's look at the shows they have for example:
Star Trek - This was a staple Sky One show for years.
The X-Files - Same as the above.
Supernatural, Leverage, V, Ghost Whisperer, Criminal Minds, Warehouse 13 and Chuck - All are their top billed shows, all are imported and could have gone to any channel, however the big players BBC, ITV, Channel 4 and Sky didn't bid for them because they clearly didn't think they would be particularly successful.
Here is their primetime viewing for today:
Nothing to Declare
Nothing to Declare
Motorway Patrol
Motorway Patrol
Brit Cops: Zero Tolerance
Why Men Watch Porn
Most Shocking Busted in the Buff 3
Sexcetera
Sexcetera
MacIntyre: World's Toughest Towns
Booze Britain
It's just constant nothing programming, it could be on literally any channel.
Given that Sky owns the channel, they will just redistribute them to their other channels.