Would go for a honeysuckle,you can get witer ones I think and evergreen ones but ordinary ones are best in my opinion.Another good one is everlasting Sweet Pea that come every year.
You could try pyracantha, which have summer flowers that are attractive to bees, and winter berries for the birds.
Some honey suckle would be ok provided you put a layer of chippings over the root end to keep them cool. jan
Check out espalier apple or other fruit trees that are grown so they grow along walls or fences, they are pretty cool looking, love to be in full sun and produce fruit. Bees love the flowers and migrating thrushes would appreciate the fruit too.
Linky about espaliers - www.bbc.co.uk/.../growfruitandveg_espalierapple1.shtml
Edible honeysuckle (honeyberry) has all the nature & appearance benefits of honeysuckle but also tasty fruit :) Kiwi fruit is a fast and (in my opinion) pretty climber that likes the sun. There are plenty of hardy varieties. However, it is not very attractive to pollinating insects, unlike honeysuckle. How about grapes? I have seen sparrows hiding in it like they do dense ivy. My preference would be for a mix of these edible climbers and trained fruit trees, but you probably want something quick-growing, and fruit trees aren't! 7m of sunny wall could get you a lot of fruit, and of course you can leave some for the birds :)
You could try Passiflora, (Passion Flower) lovely flowers, and fruit too. Quick growing, and easy to train along fence..
Another vote for Pyracantha here. I wouldn't discount Clematis. Ours are in full sun and do very well. You can protect the roots with another plant to shade the roots. Bit of info here: www.winsfordwalledgarden.com/success-with-clematis
I am trying to cover a fence in a similar position to yours and have planted a Trachelospermum jasminoides this year.It can be tender but I am on the Isle of Wight so should be OK.Seems to be growing away quite nicely at the moment!