It looks like Artemisia a wormwood. Is the foliage fragrant? Cant put a name to the variety though.

Thank you Seaburngirl. I’ve just tested leaves and surprisingly absolutely no fragrance at all.

Hi Seaburngirl, I have just done some more research .... EVIDENTLY Madagascar have just started clinical trials using this herb? as a possible vaccine for Covid-19.

It's the variegated form of Mugwort (Artemisia vulgaris). Not a vaccine: vaccines don't work that way. Quite possibly a way of treating the breathing symptoms. More improbably, but still possible, it may have trace chemicals with antiviral activity. Pretty poisonous in its raw state, and I wouldn't take any decoction without medical supervision.

Tugbrethil, thank you for your helpful comments. I will do some more searching in my books now. Just wondered if you knew if ....... Mugwort (Artemisia Vulgaris) Is likely to spread like an unwelcome weed?

Certainly the wild form is an easy spreader by seed. The flowers are usually pale yellowy/green so inconspicuous and therefore over looked.

Thanks again Seaburngirl, for your comments and interest.