Arctic Skua:Ogmore Estuary

Myself and Pedro were just getting back to the car at Portobello Island after walking the river (no sign of Little Stint) when the 200-300 roosting gulls all took flight in a mad panic,in amongst them was a marauding Arctic Skua causung havoc !
Peter got a couple of shots but I couldn't get on to it with my camera,the skua and gulls all headed down river and we jumped in the car and dashed down to the main car park and pulled up nearest the rivermouth.
The skua was still having a go at the gulls and we both managed some record shots before we lost it heading east up channel,looks like a juvenile bird (dark phase) to me but I stand to be corrected.