Hi, looks like Elaeagnus ebbingei, for the shrub, and powdery mildew on the leaves, treat with a potassium bicarbonate fungicide, Derek.

Not mildew, so far as I can see, Derek. Young leaves of Elaeagnus are covered with tiny fuzzy dots, which eventually rub off.

Thank you both.

True - ours at present looks silvery all over - very attractive.
Newbegardener this shrub has tiny white highly scented flowers in autumn which are very easy to miss but you might not get them if you are too keen with the hedge clipping...

Thanks Steragram. I was thinking of cutting it back but I will wait until it has flowered and take it from there.