[Lardman]

Lack of water, nutrients or something more sinister?

[gillie]

Oh, dear.  That looks like a virus to me.  See

http://apps.rhs.org.uk/advicesearch/Profile.aspx?pid=752

[Trillium]

I agree, it looks like raspberry mosaic virus. Soon you'll likely see brown edges on the plants. Here is some preventative help that will also work in the UK:

http://www.omafra.gov.on.ca/english/crops/pub360/notes/raspvirus.htm

[gillie]

Counsels of perfection I fear.  Who is able to plant new raspberries a minimum of 16m from infected ones?

I have always had a running battle with summer fruiting raspberries which try to die on me all the time.  At the moment I have a few strong canes bearing large delicious fruits.  Unfortunately they are suckers which have come up in the middle of a black currant bush.

[Trillium]

Are you giving the plants lots of feed (compost/manure) in early spring, gillie? They're gluttons for food as well as water. This year after I feed mine, I have to apply a really heavy leaf mulch over the plot to hold moisture as my clay soil dries out too fast for them and I end up having to water  Soon as it stops snowing  I'll be out there flinging manure.

[Lardman]

That sound you can hear is me sobbing..