Hi Folks,
I have tried negotiating with various sellers, and even manufacturers direct, but they don't really do any bulk deals that are better than buying direct from China, e.g. ali-express.
The Single channel Model is either "ANENG AOS02" or "ZOYI ZT702s" - you should be able to pick one up direct, including VAT & delivery for around £45-£50
The dual channel Model is either "ANENG AOS03" or "ZOYI ZT703s" - around £65-70 (incl VAT and delivery)
If I order and get delivered to me, there is the additional cost of onward postage in UK etc., so it makes it all the more expensive, and like I said, I can't get a better price than above anyway.