Any help to identify this plant please?

TheSloth

Hi there. Does anyone know what this plant is please? It grows every year but I didn't plant it. It propagates by runners under the gravel part of my garden. It also only grows in the hot, sun trap part, not the shady part. The flowers are lovely and bees adore it but it does smell a bit manky when you brush past it. Any help would be appreciated. 

TheSloth

The seedlings.

TheSloth

The leaf.

Silver surfer

Looks like Stachys sylvatica..... commonly known as hedge woundwort, whitespot,or sometimes as hedge nettle,

https://www.google.com/search?q=stachys+sylvatica&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjj7fmG7MHbAhWKIsAKHV1iB5IQ_AUICigB&biw=1920&bih=943

TheSloth

Thank you SilverSurfer that is exactly what it is. Many thanks.