Purple growth on leaves

I bought 2 soft fruit bushes last year .... planted them and they overwintered fine.
Loads of green leaves ... but some of them are growing what looks like purple broccoli on the surface .... it is pretty thick as well.

Any ideas what this is, and what do I do about it ?
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I get similar to this on my grape vines, I think its some kind of mite but cant help more than that as I dont seem to be able to get rid of it.

 

Its blister aphid , I wouldn't worry to much about it.