[mdjlucan]

Can you tell me what's going on here belief is curling also marks on the leaf

[mdjlucan]

I desperately need help identifying this calls what's making the leaf curling also marks on the leaf hope somebody can help me as I'm racking my brain is here

[Hampshire Hog]

My simple thought would be are they getting enough water?? I would mulch and give them a good drink.
Someone else may spot another cause.

Cheers HH

[LotuSeed]

Is it progressing gradually, throughout the canes?  In any case, I'd remove the damaged parts and put them in the trash.
Has roundup been used in the area?  Here's a link to an American site that has pictures similar to yours. Scroll to the bottom of the page.
http://www.fruit.cornell.edu/berrytool/raspberry/leavesstems/Raspcurling.htm

[Salmo]

I would give them a good watering before anything else. Not just a sprinkle, a real good soak. If you are like this area it is very dry with no more than a light shower for at least a month.

[Goosegirl]

I wondered if it was an aphid problem but, having had a look at a couple of good books, am thinking like the others to give them a good soaking and also a good feed with Tomorite or similar as the new growth looks very pale and spindly.