Why are my raspberry plant leaves curling and the fruit dying?

Hi Murray, your plants may have been attacked by green fly, aphids or leafroller caterpillars. All will live under the leaves and are hard to spot until the damage is done. Look carefully under the leaves and see what you can spot. If you damage is severe it will cause the plant to abort the setting fruit. Identify the pest and treat with the relevant insect spray from your local garden centre. If the infestation is severe, the other option is to cut the stems off at ground level to encourage new growth and potentially a later smaller harvest.