Good news, I have a solution
Thought I should post it to help 'share the knowledge'.
First of all, thanks Danny, that was what I suspected
Anyway, to the solution.
I contacted Reflex the shop who sold me the kit and posted here all at the same time (Sunday).
By Monday 9:05 I had a message from a helpful fellow Universer (theox) and an email from Reflex
The Reflex guy told me to open the 3.5mm jack plug where I would see a resistor. The solution is to solder a wire in place of/or alongside the resistor.
The net effect of this is to connect the white wire to the tip of the plug and to connect the brown wire to both the ground and the second channel. e.g. convert it to a mono plug.
So ten out of ten to Reflex for second to none support. Incedently it is a superb sim (it certainly lives up to the
PR and more).
Turning to the supplier Sussex Model Company. Well what can I say they had responded by lunchtime and offered an immediate exchange
So all in all a major triumph for the community and I can now settle into some serious learning.
Thanks to all.
P.S. If anyone else has the problem and needs some one on one detail just drop me a message.