Dovefromabove said: Hmm ... could be Cissus arctica ... aka Kangaroo Vine ... but a pic of the whole plant would help with ID.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Hmm..Not Cissus arctica.
Wrong end of the world Dove...
Think you meant Cissus antarctica.
https://www.google.com/search?q=cissus+antarctica+plant&rlz=1C1CHBF_enGB785GB785&hl=en-US&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi13pXguq3uAhWMiFwKHSwBC8IQ_AUoAXoECAYQAw&biw=1280&bih=578
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.