flower head 55mm, plant height 450mm.
No interactions present.
Leaf bases rounded and clasping, leaves edged with fine spines. Looks like Perennial Sow-thistle. But should have small yellow hairs on involucres - pic 2 out of focus so can't really tell. If they were hairy then Sonchus arvensis.
Lat/Lng: 56.0274, -2.8553
OS grid ref: NT467819