She got pilloried by the right for it: “It's government interference. And it's a nanny state.”

Personal choice v nanny state; realism v idealism – there are few medical conditions that stir up such heated debate.

Conservative leadership candidate Priti Patel said the proposals amounted to "nanny state regulation" that would be "economically damaging".

“It’s just a nanny state that we’re causing here,” he said.

In January, Ms Truss - who was briefly prime minister after Mr Johnson - struck a similar note, arguing a Conservative government "should not be seeking to extend the nanny state".