West-facing evergreen climber?
A winter honeysuckle survived (and thrived) for me high in the Shropshire "Alps", and in an exposed position well away from the house, so I know that's a contender, but the leathery foliage of the specimen I planted there was a yellowish green. But Shrewsbury's mild in comparison to the Shropshire Hills, so perhaps its foliage wouldn't be so challenged here.
D.
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