No interactions present.
The observation is from April.
Phil, we need more information before an ID can be agreed.
A photo of the back of a flower would help, as the shape of the calyx-teeth can be useful.
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
Lat/Lng: 51.4151, -3.2433
OS grid ref: ST136691