Ok, thanks for the replies, I tried to play my face about the NEW replacement unit having less warranty than a retail bought unit even though it is exactly the same item but they are having none of it.
I could go down the route of small claims and forcing the consumer rights act on the retailer as it is manufacturing fault which appears not to be able to be remedied successfully but to be honest, the retailer has been great with me, they have just been let down by the manufacturer who made an item with a design fault and I don’t want to lumber the retailer with the hassle.
So I have accepted the new unit with the 6 month warranty and may just sell it on.
Cheers