Mystery plants in the compost / soil identification

Does anyone have any idea what these are, please? Growing like Triffids, not sure whether it's a wild flower of some kind.

 

Sow thistle?

 

It could be, maybe. I had it on Anglesey, don't recall the leaves being variegated or as long. I quite like the lime streaks in the leaves .

 

Teasle maybe? The way the leaves cup around the stem...

 

One of the willowherbs possibly. The annuals look different from the perennial plant too. The foliage isn't variegated, it's just damaged- probably insect damage.
The easiest way to tell is to wait until it flowers, or even has buds. Then make sure you deadjead or pull them out if they're not desirable in the area.

 

They are spread all through the borders and in some pots, all the leaves are the same. Can't see any insects on them. I am waiting to see what they turn into before removing them. I have other unexpected plants pop up and some turned out to be Hare Bells

 

Harebells will certainly seed around well. One of my favourites, but if that turns out to be willowherb - good luck getting rid of it!
I loathe the thing, and it's very, very vigorous if it likes the spot. I also dislike the cultivated purple Lythrum because it looks too much like it!