Unknown grape-like vine. ID, please?

in Plants
This creeping plant is like a grape vine, but the leaves are thin and there have been no flowers or fruit. It's growing 300m above sea-level on the Wales-Herefordshire border. Does anybody know what this is?






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I'm still traumatised from it and can't stand the smell of hops to this day! 😄
(Having now looked up hops in Wikipedia I see that they are toxic to dogs, which may explain why the deer which wander through our garden have not so much as even nibbled the hop tower although we've seen them grazing all around it many times.)
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Gardening is so exciting I wet my plants.