Another weed question

[feelinggeriatric]

Can anyone identify this - which I am pretty sure is a weed.
I have planted a wildflower patch but this has come up all over the shady section but not the sunnier part. I don't think it was in the mix as it's all in the border alongside .

Bit stressed as it seems to spread quickly !
Thanks !!

Possibly Persicaria

Thanks @MereDintofPandiculation that's what my plant app suggested (but it also suggested another wildflower seedling was a cucumber so I wasn't sure!)

There is so much of it - is it just a case of continued hand weeding?, I can't understand how there's so much so quickly !!

I don't mind weeding too much anyway so that's lucky. Just tricky avoiding all the lovely poppies that are coming up.

In the first picture the woody weed to the top left, looks like a spur from a plum/almond tree. In the second picture I can see blossom. The spur needs to be pulled out.
Not sure what the other weeds are.

It's all under a cherry and pear trees, plus there is also a hawthorn nearby just the other side of the fence but growing over .