Pruning white jasmine

After a false alarm thinking my jasmine had not survived the Beast, it has come back with a vengeance, doing fabulously, growing fast and now starting to flower.

But, it's being grown as fence cover and a little bit over the top for privacy but of course it's growing in every direction and coming straight out from the fence!

When is best to cut it back a bit? I'm assuming not now with it flowering, but soon after?