Tortrix caught on grass and photographed on ruled paper, 5mm squares.
No interactions present.
There is a similar but larger species Cochylimorpha alternana that is much less widely distributed but I believe does occur in Kent. That species should have dark scale tufts on the median fascia (the dark band on the wing) which does not seem to be the case here as far as can be ascertained fro the photo.
Aha, that's interesting, because another moth that I had thought was C. straminea does have those blackish scale tufts.
That one was found well away from the supposed habitat of C. alternana, though.
The scale tufts on the other moth do look as though they could be right for alternana. However, as you note yourself the distribution of alternana is very much coastal (and very local) which would rather reduce the likelihod that this is what your moth is, given your location. I think you would need to confer with someone more familiar with that species to be certain of its ID.
I have asked an expert, who thinks that that other moth is a "very fresh and over marked straminea. Alternena has more dark markings and is quite a bit bigger than the inland one." I have added this note to the other observation too.
Lat/Lng: 51.39174, 0.06151
OS grid ref: TQ435678
In a meadow area.