I saw this idea outside Wetherspoons near Trafalgar Square two years ago. I have a patio with a very high wall and copious ivy, so I've been training my ivy since then, rather than let it cover my wall entirely. It's trained along strings of old garden lights which were here when I moved in. I just think of it as fun but recently have seen similar in a topiary book, which makes it seem serious! Anyway, thought you may like to see it.
Being quizzed by chemist's assistant in Boots.