Roy,
Due to the undulating nature of the field with its several folds often hiding some of the Swans, I only later discovered Mute Swan there, too.
What Brian says backs up my (lengthy) chat, after you and Linda had left, with the owner of that delightful detached house by the Canal backing onto the field. He said that some new Swans had arrived recently in the field. He also mentioned that he'd had Waxwings in his garden last winter but none to report (so far) this autumn.
He was delighted when I handed him my binoculars to view the Shrike perched in a Hawthorn just across the Canal from his garden.
Pleased to meet up with you and Linda again and to have the Shrike pointed out to me on my arrival.
Freddy