Under "common law" in the UK you can bet the medic's would be covered. You need to be able to demonstrate that a direct and urgent intervention was required whose nature precluded the need for consent. You also have to demonstate that you have the urgent treatment the person requires. If you opicked them up against their will and toook them to a hospitla that simply made them comfortable but did not provide an urgent medical input, I'd not want to be defending that one, you could be done for assault.