Walked across the barrage and back this morning. On the way out the Common Tern was feeding mid-bay with 100’s if not 1000’s of Black-headed Gulls at around 12:00. Returning, eventually found the Tern again, plus and AdS Med Gull and also a 1st yr ‘W’ winged Little Gull. Pretty hard work picking them out with just bins but good practice!