Heres a list of freesat channels,
freesat Channels - Free Satellite, HD & Radio Channels - freesat is there something you get on freeview currently that isn't listed?
they should certainly replace your twin tuner PVR with a freesat equivalent so you are no worse off...
My Mum recently switched to Winter Hill for exactly the reason of Haslingden having less channels, luckily she doesn't appear to be affected. Hers is a brand spanking new fancy aerial though. At my house we have never been able to get a terrestrial signal due to teh trees etc being in the way so I've been on Sky for > 12 years