I did a bit of digging and I've found that the Freesat EPG is on 11428H, 27500 2/3. However there doesn't appear to be any channels on that frequency.

So if I want to load it quickly how would I connect to the home transponder? I could use a zap timer once there was a channel there.

I'll test it later but I'm curious to see how long it takes on any freesat channel to download it.