Now that's an issue and part of the reason for so many dishes. When they launched the new Astra 2 satellites we lost the UK beam, since the new sats have a deliberately very steep drop off in signal outside the footprint. Since then every now and then another channel moves from the southern beam to the UK beam which is annoying but for now it is still worth the Sky subscription and the 1.35m dish.
At the time I did some research and found out about the Intelsat 907 option at 27.5° west and sourced the correct receiver with a second hand dish and used that for the terrestrial channels which were available on it. If you know about that you will know that it too went defunct this April when the signal was moved to Telstar 12. Intelsat lasted about 11 years which was more than I expected but Telstar is unobtainable because while the North Sea beam is theoretically receivable this far south, they have put the BBC signal on a frequency very close to another transponder on the southern beam, so it is drowned out outside the Northern footprint.
Now we are using a service called Kabelio for BBC/ITV/CH4 & 5 etc, which is quite good because it also has a selection of French, German, Swiss, Austrian and Italian channels which can be interesting if you are in an international frame of mind! This requires another dish but smallish because it is on Eutelsat 13 at 13° east which is aimed at this area and that is the dish I was setting up when we arrived. I don't leave it up all the time because of the number of dishes being a bit ugly and it's only on a fence pole which is not quite steady enough in the wind.
The plan is to get a multi LNB holder and get this plus Sky and Astra 1 all from the big dish to reduce the overall number - I also have a subscription to NOS in Portugal which is on Hispasat 30° west, facing completely the other way to Sky and also we have satellite Internet on yet another dish. This has a built in VPN so we can use the Sky+ box for downloads and watch them when we want which is better than streaming, although the Amazon fire stick does work and we use that occasionally.