They've continued their stretching this week. The tallest are 35 cm tall and a few of them about 10 less. I've been defoliating a lot and just done some minor training.
@Sweet_Seeds,
Thank you, Apolo! The Sweet Cherry Pie in this diary is actually a descendant from your Sweet Cherry Pie that gave me a bunch of seeds a couple of years ago. These seeds have excellent genetics. I've grown a few myself and given away loads to mates.