I was aware that a large number of Manx Shearwater were present off Berry Head so eventually got down to the point at 1630hrs. Massive amount of Manx moving both North and South which made counting pointless.
At around 1700hrs a huge feeding frenzy began moving south into my field of view from Berry Head. I would estimate it at 1000+. Joining in with the flock which moved south the whole time were 20+ 'commic' Terns, At least 2 Balearic Sheawater (probably more tucked away), Adult Pomarine Skua with full tail, and a sub-adult Pom. Another 2 Skua sp. (Arctic/Pom) moved with the frenzy also. Very enjoyable watching the action until I had to leave at 1800hrs