Obelisk celebrating pioneering Lady Mary Wortley Montagu given higher listing

Aristocrat introduced smallpox inoculation to Britain, saving many lives, yet remains largely unknown

It is a monument that celebrates the achievements of someone who would, her supporters say, be far better known if she had been a man.

But now a 300-year-old obelisk is being given one of England's highest listings because of the remarkable story it tells of an overlooked medical pioneer.