well what does it mean?
It's to do with all the drugs we use in the UK, Paulie. You see, US pharma companies want to sell their drugs to the NHS at a higher price, around 2-3 times what we pay for them now. Currently, we can get good deals due to a thing called NICE (that stands for National Institute for Health and Care Excellence) which determines what the NHS is prepared to pay. They can do this because of the NHS's huge purchasing powers, aka "We'll decide how much to pay for our lots and lots of drugs thank you"). Now, because the UK is a "pricing reference country" (which means other countries look at what we pay and will refuse to pay more), if the US companies can get more money for their drugs from us, that means they can charge more to other countries, and thus make more money.
There are no doubt other areas where american companies would like to make money from our NHS, but the drugs are the main concern right now. Because you see, if the NHS have to pay 2-3 times more for expensive medicines and drugs then they might not be able to get all the drugs and medicines they need to keep us all from becoming too unwell.