We thought we had encountered Striped Dolphins which according to this article are rarely seen in Cornish Waters!
We saw them on the 12th of August 2017, three days after their first official sightings in Cornish waters!
UPDATE: I sent the footage to orcaweb.org.uk who confirmed that they are actually White Beaked Dolphins. They had this to say about them;
“Still a really exciting spot – we’ve only ever seen white-beaked dolphins once on surveys in the south west and not since 2014. The vast majority we see are found in the North Sea on our Newcastle-Ijmuiden survey route.”
The Dolphin footage starts at 4m45sec.