Red Dead Nettle or Lamium purpureum at a guess.

I think it's a wild flower called Stachys sylvatica ... Hedge Woundwort

Thanks both, I've Googled what you said that's it Hywel thanks.

If you can, leave some for the bees, they love this type of snapdrogon flower, they are pretty and our wild flowers need all the help they can get!

If you do leave it be aware that it runs and spreads. It took me several years to get it all out of the veg plot.

Stachys sylvatica is extremely stinky and spreads widely by stolons (runners). It's very common in the wild, get rid of it in your garden!

Thankyou all its in a friends garden, I will pass on the info

On the plus side I did once use a leaf on a wound to see what happened and it healed quickly...

Or if you do like it grow in a pot to stop it spreading? Like you do for mint