I'd got the spelling wrong...it would have been growing up through another shrub... http://www.ballyrobertcottage.com/plants-beginning-with-t/tropaeolum-speciosum
This is a picture of it in situ. I think you're right, it is growing up through the other shrubs.
http://i62.tinypic.com/33bliq1.jpg
Thanks again for your speedy help and yes, it is lovely. We've never knowingly seen it in England.
It's beautiful grown like that, I don't remember seeing one for real either. It's Chelsea week, what's the betting there'll be some on there now it's been talked about? :)
tropaeleum is a bitof a devil to get going. it needs a long cool root run and its head in the sun so deeply culivated earth in shade with a sunny aspect. growing through thick shrubbery will suit it well.