David Hill wrote:

Ellie wrote "........I have planted some raspberry bushes and I'm wondering
if I should expect them to shed their leaves in the autumn, or if they stay
green all year..........."

Firstly raspberries grow on canes and not bushes, and normally they fruit on
the previous years canes, so that after fruiting you cut out the old to
leave space for the new canes. The canes that have fruited normally die over
the winter months anyway,so the question of if they shed their leaves or not
doesn't really matter.
I would be more worried about them drying out prior to fruiting

Sorry for my American colloquialism. We always called them raspberry
bushes, although we did refer to individual branches as canes. Do all
varieties fruit on the current year's canes?