'Unicom' works well in the good 'ol US of A because everybody uses it, everybody has been brought up with it and the country is HUGE. Radio discipline is good, and everyone gets on with it.
In the UK, its different. No radio discipline at all, too many gob$hites wanting to tell everyone where they are, what height they are, what power setting they are using, all within a country the size of one American State. Which is probably why 'Unicom' is never realistically going to happen in the UK. Just have a listen to 118.000 on any busy weekend for an example of constant, and pointless chit-chat.
So, as I suggested to Shaggy Sheep Driver last week, best get on with it, turn the radio off, and fly VFR outside CAS where you are entitled to be without all the distractions of ATC. All the while, of course, keeping a GOOD LOOKOUT and not concentrating on the GPS. No radio=No hassle. No hassle=FUN.
I'm off down the hangar now, its a glorious day, despite what them WX chaps said it was going to be like.
Toodle pip