I love jasmine but it can get a bit straggly so mine grow through honeysuckle - they can get straggly together.
I've taken some euonymous cuttings this morning, and will be on the lookout for a cheap clematis viticella, I've got time as we have yet to get the ivy down and I fear the existing trellis is non- recoverable so that might be a deciding factor. At least the euonymous won't need trelllis. Thanks for all the suggestions