Maybe we could convince supply chain to buy the batteries from Panasonic ( from what I can find out 1000 seems to be the minimum order quantity), and then with it's collective buying power it could obtain the best prices for the NHS ( i think that is what the intention was originally).

Early research shows buying from recognised electronic wholesalers will bring these in at around a euro each when buying a thousand. I am almost considering it as it is cheaper than buying 100 from the OEM, but maybe if a few hospitals pooled their buyer needs it could work, but maybe we would all be modifying the pumps....