The bottom one could be the type of wild fennel which freely self-seeds. Could also be a dill I suppose, without me going out to look at the fennelly one I have. The fennelly ones I have are more upright and not so floppy. Therefore my final vote goes for the "mayweed" or Tripleurospermum maritimum.
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2. Willowherb ... flamin' nuisance ... don't let it seed whatever you do! hundreds of fluffy seeds float everywhere and take root.
3. Not sure ... could be a Nigella ... or could be one of the Mayweeds.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Crush a leaf and see what it smells like.
Scentless mayweed | Garden Organic
Scented mayweed | Garden Organic
It does seem to have benefits so I might leave a couple of them alone. Good luck with yours!