Sadly I'm gradually starting to think the same way, Paul. I've used Sky News for many years but each change they make seems to be a small incremental change for the worse. I like Ian King's business programme but it is not a patch on Jeff Randall's previous one. Sophie Ridge is OK but nowhere near as good as Dermot Murnaghan's Sunday morning politics programme used to be. I am still hanging in so far but I am beginning to think that Kay Burley first thing in the morning could be the final straw. I have no idea why Sky still employ her.
I asked a friend this morning if he could still get Sky News on his Sky box. He said it was still there but unwatchable, i.e. both picture and sound breaking up and/or disappearing. Based on that description I don't believe that they have changed to the UK beam. It sounds to me like they have done one of their periodic adjustments of the position/alignment of the satellite and that has tipped it from being receivable to being not receivable/marginal. Realignment of the dish might solve it.
Satellites constantly but very slowly drift in both position in orbit and alignment of antennas. The satellite operator doesn't typically carry out constant adjustments, which would use a lot of fuel, but rather periodic adjustments when it has drifted too far. In Crete we are close to the limit of what is receivable with a reasonable size dish. Satellite data does not behave like analogue TV transmissions, where the picture and sound just get gradually worse and worse with noise as the signal gets weaker. If the signal is locked you get a perfect picture but if it loses lock you lose it completely. The difference between being locked and not locked could be a fraction of 1 dB in signal strength. Loss of analogue signal is like rolling down a hill while loss of digital signal is like falling off a cliff.
I've got a 1.8 m, elliptical, offset, MABO dish for sale if anybody wants it. It is complete with a solid floor mount and LNB, although I cannot guarantee the condition of the LNB. I had it bolted down on a flat roof in Crete and previously attached to a wall mounted pole of my own design when I was in northern Greece. Make me an offer if anybody is interested. Buyer collects. I cannot guarantee it will be any better than your existing dish but it served me well for many years before I switched to Internet streaming. I don't think MABO make dishes anymore so I cannot provide a specification.