Help to identify 2 new arrivals

in Plants
morning Everyone
during a bit of a clean up yesterday I came across the two plants below. One has popped up in my pot of delphiniums which I cut back recently. It has grown very rapidly so I’m thinking possible weed. Bottom photo.
the second one is growing under a Rose bush and is very spindly, but possibly as it is struggling for space and light. First photo.
as always thanks for your ideas and counsel.
during a bit of a clean up yesterday I came across the two plants below. One has popped up in my pot of delphiniums which I cut back recently. It has grown very rapidly so I’m thinking possible weed. Bottom photo.
the second one is growing under a Rose bush and is very spindly, but possibly as it is struggling for space and light. First photo.
as always thanks for your ideas and counsel.


Marne la vallée, basically just outside Paris 🇫🇷, but definitely Scottish at heart.
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The second has me baffled, that leaf shape with the terminal notch is quite unusual. The tulip tree, Liriodendron tulipifera, is the only plant I know that has a terminal notch, but the overall leaf shape is not like your plant, more like the leaf of a London plane with the end cut off. I do hope you find out!