Especially UK? What makes you think she'll have any negative effect on non-UK stocks?
She'll devalue the pound and make non-sterling assets look better, almost certainly.
Removing So much wealth from the country. (paying for Fossil fuels) is going to cause so many UK businesses to fall away that the impact will be substantial.
Banks with mortgages defaults
House builders with hugely impacted profits
Manufacturing slow down
Etc etc
That's my view anyway
Just easier to be out at the moment