Recently we drove down to a village called Chalais not far from Belarbre in the departement next door - Indre. We went to see the church as we'd read it was worth visiting.
A well trained climber!
While in Chalais, a tiny village with a small green round the church, we spotted this simple but effective method of getting your trailing plants to do what you want: tie a rock to the shoot or branch you want to cascade over the wall and let gravity do the rest!
Sadly the church was shut -- recently we've been caught out by this a few times. Our village church is always open, so we've not really got the mind-set that churches might be closed. However, as it has now happened a couple of times we are more aware of the possibility of it occuring. Unfortunately, it can be impossible to find out in advance whether a particular church is open or shut so going on a visit remains a gamble!