Sky currently has 55k (as per their annual report) UHF customers, surely if sky pulled finger (or when do the licenses expire?) and moved everyone off Analogue onto Satellite then this would also open a massive range of UHF bandwidth. A lot more than 1+2+3+4. However as we know Sky / Prime are not in bed with Freeview so this could drag it all out longer than necessary.
Sky have requested an extension to their existing UHF rights. I'm not sure of the period but I think it was until 2020. Now If they got this I wouldn't be suprised to hear about a DTT Pay network from Sky.