It was on a water tower in the same direction as Emley Moor.
However it appears to have moved site to the Askham Bryan college when it became That's York - but is not on the MB21 site that I can see.
No, Bilborough was the site that the York local mux ended up using, there was a last minute change of plan
As for the EPG
allocation, you can have the same allocation for local services using the same site or in the same area.
Hannington carries two muxes, one for Reading, the other for Basingstoke. During a scan, I'm asked whether I'm 'Berks and North Hants-Hants' or 'Berks and N Hants-Berks' !! If I select the former I get That's Hants on Ch 7, and That's Thames Valley on 800, or the latter vice versa