any Sambucus nigra cultivar will stink if you rub the leaves or stems, that's a good diagnostic tool for that species, don't know if it works for other species
Thank you to everyone for your help. My mum's over the moon to know what it is although at her age (and mine these days) she and I might forget again next year!
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Sambucus nigra Golden Towers will have black berries.
While Sambusus racemose Sutherland Gold berries will be red berries
See pic below showing leaves.
In the sticks near Peterborough
Had a 2nd look. I don't think it matches!
Sadly I cannot steal your image to display it here together with my pic.