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It's a Viburnum, and it is a very nicely fruited selection of Viburnum plicatum var. tomentosum (syn. Viburnum plicatum f. tomentosum) - which I know as Doublefile Viburnum.
Named selections that I would expect to perform like this include 'Mariesii', 'Shasta', and 'Lanarth' - but there are many more to be found.