Clematis armandii is evergreen and pretty quick growing, though it will all depend on your soil and the aspect (south facing? east facing? etc). You will need to put in some stakes and run wires between them to give it something to climb on.
You could try trachelospermum jasminoides, that's evergreen and perfumed, but it depends on whereabouts you live as it isn't hardy in really cold areas. There is also lonicera (honeysuckle), but l am not sure if there is a true evergreen.A lot depends on soil and aspect as DampGardenMan says.
Thanks for your response , I live on the very south coast of England, pretty much in the middle opposite the isle of Wight and very close to the sea. We are quite exposed to south westerly winds.
Thank you impatient Gardner.. Yes i agree this is stunning, unfortunately I need something to climb on trellis to form a devide. This really needs wall.
If you can forego the scented requirement there are lots of ivies that would do the job. Tough as old boots and perfectly happy clambering up trellises. I use them to make windbreaks quickly in my previous garden.
In my experience, the only evergreens that cope with really windy conditions have small leaves and are either waxy or furry. I'd be inclined to try training a shrub with a 'long arching' stems habit - one of the cotoneasters or, if you can cope with it being prickly, a berberis or even pyracantha.
Lonicera fragrantissima may be evergreen down there - it's mostly evergreen here. It's a very untidy shrub and it could be trained to a fence, I think. That may make it less evergreen though by exposing the stems more iykwim.
One approach may be to have a couple of different things - something that may be more evergreen and something that may be more fragrant growing into one another to get the overall effect you want. A cotoneaster for winter cover with a clematis for spring/summer fragrance growing through it, for example.
“It's still magic even if you know how it's done.”
Don't discount ivy... it would cling quite tightly to your support/fence and look dense and neat almost like a hedge. There are some nice varieties like Green Ripple.
You could grow deciduous climbers through it for colour.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Lonicera fragrantissima may be evergreen down there - it's mostly evergreen here. It's a very untidy shrub and it could be trained to a fence, I think. That may make it less evergreen though by exposing the stems more iykwim.
One approach may be to have a couple of different things - something that may be more evergreen and something that may be more fragrant growing into one another to get the overall effect you want. A cotoneaster for winter cover with a clematis for spring/summer fragrance growing through it, for example.
You could grow deciduous climbers through it for colour.