St Govans migrants

Along the cliffs from St Govan's to Stack rocks, c20 Wheatear well spread out so presumably on territory. None seemed to have Greenland features.
20 Swift over Trevallen Downs behind the head (that looked a good spot to find a rarity but no luck) and 12 House Martins.
3 Sanderling on Flimston beach until chased off by gulls.