No way, third party suppliers do a great service to the NHS bringing the big boys in to line on pricing.
Easy for a small company to copy something and sell it at a lower price without having to spend vast amounts of money on R&D, regulatory requirements and registration, while maintaining device vigilance and support for the life of the device. Maybe you want these suppliers to copy the who unit and sell it at a lower cost? If so it won't take long before there are no new designs to be found and the quality and regulatory elements would lead to sub-standard medical devices.
People that claim we should stick to the manufacturers parts clearly have no confidence in their ability to test and determine suitability.
Could it be those purchasing third party parts have over confidence in their ability, as they have been blinded by the monetary element? Maybe the parts are suitable and safe but if something does go wrong be sure someone else has singed off on the use of such parts. After all you need to ask yourself if you want to spend time in prison to enable someone else to meet their budget!
Just a thought but maybe those high prices you have to pay for the OEM products and parts is as a result of you buying third party items, and the OEM compensating for your actions
Are we saying that the (many) suppliers of non-OEM items (batteries, cuffs, probes at al) are trading illegally?
Providing they are not infringing any copyright probably not. A lot would hinge on the claims they made for the item and if they really met the regulatory requirements for the item conformity mark. It would be up to the purchaser to determine if the company really did meet all the requirements stated. You may have tested a part and determined it was compatible and safe but did you check out the company making the part to see if they really meet all the requirements (e.g. are they registered with the MHRA, ISO 13485, ISO 14971, etc.)?