the manure won't have been good for it, those plants that like well drained soil don't appreciate that. and we've had a lot of rain here, that's not so good either.
an oxonianum hybrid, one of many, would be my guess
I don't think it's a teasel. Ceres asked the question re the spines but it hasn't been answered.
vialii is a species, no problem with seeding true with that one.
It's not just the F1 hybrids that don't come true, none of the hybrids or culltivars will.
It might be Canadian Fleabane, Conyza canadensis
Still a weed though
They are generally smaller than biennis though it varies with soil.
Oenothera of some sort. O. versicolor maybe.
I don't think the Glanville Fritillary visits Lincolnshire any more but I have the plants just in case it drops in on the way North. We've had a Silver Washed Fritilllary once or twice but not regularly.
Just grass is boring GD. I find it hard to walk between the cowslips and primroses of grass paths in spring