Flower stands or shops near London Charing Cross station?

A bit of digging turned up Pink Pansy at the entrance to Embankment tube station, down Villiers Street which runs down the side of Charing Cross station between The Strand and the river.. don't know them but they seen to meet your need. https://www.pinkpansy.co.uk/

I'm not sure if Pink Pansy is the same shop as I've often seen at the entrance to Embankment Station, which always has a really good selection of flowers.

Thanks for the tip. I will be on the lookout.