Thanks to Geoff Campbell for these Ross's Gulls photos, Geoff has more photos both on flickr and website, its worth a look.
In Co.Down: Its omnipresent, the 2ndw Ring Billed Gull is still at Groomsport (David Rafferty)
The Ross's Gull and at least 3 Iceland Gulls, 2 Glaucous and 1 Kumliens Gull were at Ardglass Harbour (Richard Hoy)
In Antrim: An adult Kumliens Gull was at Sandy Bay, Larne
An adult Meditterean Gull was at Antrim Road Waterworks Belfast