No interactions present.
Might be 2 species here. The small ones on the exterior look like Lepas pectinata? Lepas pectinata IDed by ChrisMcA on another observation of mine made on the same beach, the same day:
Y've 'taken the words out of my mouth'; I thought I'd already posted the comment but must have forgoten to save
Lat/Lng: 55.2372, -6.3857
OS grid ref: NR212024