Hi, you could try Clematis armandii, although not completely hardy, but should be ok, try to give it as much protection as possible from cold winds, and if we get a cold winter, throw a fleece over it, Derek.

Maybe a pyracantha, their mass of tiny flowers in Spring is a delight followed by the colourful berries in autumn and winter.

Thanks, I'll look into both of those.

Clematis repens 'winter beauty' is evergreen and flowers in the winter white flowers.