Actually, I have overlooked past experience flying offshore but then I was young and not in touch with my Mortality as I am now in my Retirement Years.
I can tell Dick of a very close miss while doing this IMC in Un-Controlled Airspace thing in the UK.
A BAH 61 inbound to the Shetlands passed me in cloud as we were going Outbound. We missed by about 50 feet in height and maybe a couple of hundred feet laterally.
It was right at the VOR/DECCA change over point.
I can still see what the BAH Pilots were wearing.