Solved Plant or weed identity

Hi all I was wondering if any one could help me identify this plant or weed that I have in my garden.

 

Willowherb, a weed.

 

Are that's a shame, we had one in are garden when we moved in about four years ago.

I replanted it and now seem too have lots popping up.

Thank you for the reply.
Will hold on to a couple

 

They persist/spread from root stems (stolons) below ground.

Shame it's not a Rosebay Willowherb, I find great drifts of them rather attractive

 

Wow that looks great