i have looked into this and the company i brought mine from appear to be a company who make the lines using HEL's blueprints under licence to them!!
*Hi there,
Many thanks for your email. If you could please take some pictures of the product and send it to sales@*****.co.uk
So we can email it forward to HEL manufacture. We got the blueprint from HEL and that's where we followed from. you can return the item back to us as long the item has not been used or has any damaged on it and when we received it back we are happy to give you a full refund back.
Sorry for the inconvenience.
Many thanks*
this was a email from them