Depends on the variety really and if you want the berries in the autumn.

The one I used to have I used to cut back in the autumn/early spring vry hard and then leave it for several years until it got too big then I did the same again.

if you know which one you have then someone will give you the correct pruning regime.

SBG I asked a q about opulus compacta a few weeks ago - do you know if it is self fertile? (Sorry for muscling in on your question Mychurch. If you don't know what variety yours is you can put on a photo.

V. opulus is the geilder rose [native one] and the one I had berried so it must be as I wasn't aware of any near by.

Thankyou SBG. Perhaps it could giver mine some berrying lessons then!