In reply to Bottom Clinger:
Maybe time for me to call in at Marshside again.
This evening popped into Doffcocker (Bolton) for a quick visit whilst Mrs was at physio. As expected too early for the Common Terns to be back, apparently nothing special there but carried on walking round.
At the dam end, plenty of domestic geese, Canada Geese, Tufted Duck and Black-headed Gulls so thought I better check them all out just in case...
Bingo - 1 of them was a Mediterranean Gull in full adult summer plumage - it flew off whilst I was still scanning to see if there was more than one, then a family started throwing bread for the geese, etc - the gulls all screaming about and the Mediterranean Gull returned, flew around several times going past me very closely - easily within 10' - best views I've ever had of one - brilliant 😁