Poor phone camera photo I'm afraid..
No interactions present.
Just thought it was odd as I found one the other day growing from a nick in the pavement, Dan I would add your ID as just Oenthera, I can't be sure but the style looks to be longer than the stamens so possibly large flowered.
I will be adding mine shortly when I catch up :)
Lat/Lng: 52.7, -2.8
OS grid ref: SJ4912