IMC flight without radar happens all the time in the UK without incident.
I have had much closer shaves performing procedural approaches under rubbish ATC instruction or rubbish pilot liason with ATC.
EVERYONE is trying to get established on the FAT to a runway. Hardly anyone is trying to GH in the middle of my random cloud...
And remember, uncontrolled IMC flight is PERFECTLY legal in the UK. I am NOT in the habit of wearing a stetson and six shooter.
Safe flying,
WWW