Ray, not sure about stereo/mono. It does not have a switch for that. I bought the headset from a local pilot store. Right afterwards I went to a hearing aid audiologist and got my ear impressions. Then took them back to the pilot store. They have a 3d scanner for that, scanned the imprints and uploaded them to Phonak. If your store does not have the scanner they will have to mail the imprints to Switzerland.
If you check out the Freecom product page there is a "how to buy' section which lists two dealers for UK.
Looking forward to reading about your experience.
