Found on a remote beach on Mull - many Barnacles clinging to a plastic bottle, at low tide. Has it floated far?
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Looking at the actual size you've actually got 2 species, one I'm pretty certain is common goose barnacle (probably young ones), & the other smaller ones with the ribbed sides I'm pretty certain are Lepas pectinata
Lat/Lng: 56.2861, -6.2382
OS grid ref: NM378184