@kezo thanks for the reply.
The caravan is in Barmouth, entering the post code into the freeview checker it comes up with Preseli, all of the aerials on site point to Preseli.
The caravan was 6 years old when we bought it 6 years ago, the aerial at the time was the one supplied and fitted by the site employees and was a mixed bag or reception, 2 or 3 years ago I replaced it with the linked aerial that has an F Type screwed connector, I also lined it up with a Signal Strength Meter and all was good until recently.
https://www.screwfix.com/p/labgear-tri-boom-tv-aerial/839jr
We get high winds and it’s possible the aerial has moved, I’m going back this weekend with the step ladders so I’ll have a look. We get HD channels on channel 40 multiplex which is usually okay, however the TV’s in both of the bedrooms are old and don’t have HD tuners so there is no 101 for BBC1 HD only 1 for BBC1 SD which is on Channel 43 Mux, it also means all of the other channels on that multiplex are missing, all three TV’s struggle with channel 43 mux.
If you noticed on the pictured TV signal screen I have also manually tuned Channel 26, this mux is Irish SOAR View TV with this signal coming from south of Dublin, this signal is hitting the aerial at 90 degrees but we could still get a good enough signal perhaps 50% of the time, I can’t remember the last time we were able to do this so that suggests that although the aerial could be out of alignment with Preseli there must be more to it than that or we would still get Irish TV 50% of the time.
I’ll do a continuity test on the cable from the aerial to the splitter just to rule it out and check the integrity of the aerial connection for water ingress and also realign the aerial using the signal strength meter. I’ve actually replaced the splitter/booster box to rule that out. If I have no joy I’ll have a look at the filters.
Daughters motability car Hyundai Tucson Ultimate self charging hybrid Serenity White Moss Grey interior.
My car SEAT Ibiza SE Tec 1.2 petrol TSI 2017.