Compassion, a climbing rose, and Clematis: early flowering: Duchess of Edinburgh, Miss Bateman; spring and summer flowering clematis: Henryi, Marie Boisselot (syn Madame le Coultre) all the clematis mentioned are not species, (as is montana - the species get much larger) - the last two do get taller than you want, but can be pruned in late winter to restrict size, back down to 2 or 3 buds from the base by mid February.

2 metres is a bit lmtd but you could keep most climbers in check .you could grow 2 types of grape and get some nice fruit out of it or a white and blue wisteria perhaps .

Grape sounds interesting NoseyP but its quite exposed to north winds..will it survive? Had a look at the clematis Bamboo..think I would prefer D. of Edinburgh, such a long flowering time but the hardiness is borderline...mmm must ponder some more
Thanks for your help guys
Margo

Try Trachelospermum jasminoides(white) or asiaticum(cream). Both are slowish growing, evergreen, and have sweetly scented flowers over a long period. Asiaticum is slower and smaller growing, but they are easy to prune to the allotted space.

maybe not tetrarch but it mite be worth a look .

Just to let you kind folks how Im progressing. I have a Banksia Lutea rose for my yellow..I was going to get a Clematis Love Child (Spritz suggestion)for another side (have 4 sides) but Taylors sold out already and I cant find it anywhere else. Got a Niobe Clematis for another side. I think the Banksia might romp a bit so would like to train it over the top and down the other side if it will go, which leaves me one more..and I think it will be Miss Bateman if I cant get Love Child.
Thanks again.