Please identify this plant

This made an appearance in my garden.
I left alone as I appreciated the yellow splash of colour .
It has since died off .
It's in the sane family as the Primrose and has some medicinal use in the right hands .

Yellow loosestrife is an invasive species here, and quite common. I think of it as a ditch plant, seen roadside and wouldn't think to plant it in the garden!

When you stop and look, it is actually quite pretty.

I'm another one voting for Yellow Loosestrife. Had it in my last larger garden. Bees, etc seemed to love it and it gave a vibrant splash of colour.

I think a bit differently and would hazard a guess at yellow rod many slightly different plants in the genus

I’ve got it in my garden and feel quite privileged because there is a rare Yellow Loosestrife Bee that lives mostly on oils that this plant produces.

That's amazing. Thanks all. Mine has been in a corner and for the last 30 years at least has produced about five stems a year. No spread. I had better not tell it about spreading possibilities.

It's Lysimachia punctata, also known as Yellow Loosestrife, an old cottage garden plant. It spreads quite a bit in damp soil - in my opinion, a bit of a nuisance!

Yes, yellow loosestrife. It's a wild flower, which is perhaps why you couldn't find it if you've been looking at garden flowers. It spreads, but not so much that it's a problem. There is also purple loosestrife, which I think is a different plant altogether, not just a different colour of this one

PlantNet says Loosestrife.