PT
The cynic in me thinks the two muxes are more likely to have been kept to ensure ITV can still sell separate advertising to the Scottish bit (unlike C4 & C5 who just bombard Cumbria with Scottish adverts)
Networked ITV - 1990s and before...
And, remember, Caldbeck has two muxes currently radiating the same ITV service. They are there because, presumably, it is felt that, at some point, some Scottish programming will be broadcast on one of them.
The cynic in me thinks the two muxes are more likely to have been kept to ensure ITV can still sell separate advertising to the Scottish bit (unlike C4 & C5 who just bombard Cumbria with Scottish adverts)