Antimicrobial resistance could soon kill at least 10 million people per year and wipe out humanity "before climate change does", England's chief medical officer has warned.

Professor Dame Sally Davies also cautioned the post-Brexit UK against importing meat or fish from countries that "misuse" antibiotics while rearing livestock.

Antibiotics overuse in medicine and agriculture leads to bugs no longer responding to the drugs made to kill them.

If these antibiotics stop working, a minor infection such as a skin wound could prove fatal.

Dame Sally, who leaves her post at the end of September after nine years, told Sky News: "We humans are doing it to ourselves, but it could kill us before climate change does.

"It is a very important area and we are under-investing in sorting it out.

"Antibiotics underpin modern medicine - you can't have gut surgery, replacement hips, all sorts of surgery without risking infection.

"At least 10 million could die every year if we don't get on top of this."