Minor update.
Finally moved into the new house, and bought a used plastic dish (Luxor 120cm ish), pointed at 28.5E at my location (in Denmark) Im able to get really good reception on the UK channels 80+% signal & quality using a cheap "opticum" LNB. Although sadly the reception dies out at about 20-21.00 in the evening (I've read other experience that).
But I'm REALLY surprised how well this very old dish performs.
I've ordered some other LNB's to try out, if it will give me a bit more time in the evenings ( Inverto Black Ultra and a DUR-Line +ultra).
I can even see in TVheadend when trying out the astra 4k channel, that I pull about 32000 kbps down, which I'm quite impressed by.