Sacha wrote:

Climbing 'Etoile de Hollande' sounds as if it ought to be wonderful -
velvety red with a rich fragrance. I want one!

That does sound gorgeous. I'll check out disease resistance. Thanks, Sue.

'Etoile de Hollande' is a very fine climber producing a mass of rich
crimson flowers in June, a lesser, but still very impressive show in
late summer with the occasional intermittent bloom in between. It
needs watching for mildew on a dry soil and occasionally gets
blackspot, but is vigorous enough to cope with it quite well. Well
worth the risk IMO

'Compassion' is a very good modern HT type, but for that wall it may be
bit too short and rather too stiffly upright. It will take some very
stern training to develop the amount of wall cover you need. Great for
pillars though and limited spaces.

'Shot Silk' would do the job well though. It is healthy and fragrant
with good 'clean' foliage and can cover a large area quickly. Maybe
the shade of cerise is a tad strident for my taste, but it has
fragrance in bucket loads and repeats reasonably well.