[doganjo]

Photo below shows berries (very tasty, larger than any rasps I've had before, so not sure what they are, wrong shape for tayberries.

Problem is the leaves - a lot of them have yellow blotches on them, they're all mottled - no beasties.  What's the cause do you think?  Is it the variable weather or should I have a closer look for beasties?

Fruit is absolutely delicious by the way.

[Peasgood]

Downy mildew
http://gardener.wikia.com/wiki/Downy_mildew

[pgkevet]

Likely one of the rasp viruses. They used to say to move the bed and restock with virus free source every 7 years.

[Fleecewife]

Looks like a virus to me too.

[Peasgood]

I have never known a virus infected raspberry to have good fruit at the same time. They are usually crumbly and misshapen.

[doganjo]

It';s not downy mildew - doesn't resemble that at all.  I reckon it's teh rasp virus, but teh fruit are larger than any rasps I've ever had and tastier too.  Anyway, I have a garden not a business and don't have anywhere else to have rasps so they'll stay put for this year and we'll see what happens after I've cut them right back in autumn.

Thanks for all your replies.