Thanks to ALL who replied. I enjoy listening to air traffic comms typically those aircraft flying Westbound (from the UK to the United States) and also those aircraft flying from the US to the UK and further East.
Typically the HF frequencies from NAT-C (Routes between 47N and 64N) [Assignments to aircraft flying EASTBOUND or WESTBOUND tracks] seem to be the most active -- Gander Radio, Iceland Radio, Shanwick Radio which operate on 2872, 5649, 8879, 11336, 13306, 17946.
I'm only able to use an indoor antenna which is an AOR LA-400 Indoor Magnetic Loop and use that with my Icom IC-R8600. Surprisingly, I get very good results.