The fruit grow on the previous year's stems so you'll get more next year. Wait a while & it'll lose it's leaves so you can see the stems better. You prune to create a 'goblet' shape, like you were cupping both hands together to catch a ball. Cut the middle stems out for better air circulation then any unhealthy looking bits & anything that's crossing & might rub off bark in the wind & be a way for disease to get in

this is the rhs info. I followed that when we grew them 15 yrs ago.
https://www.rhs.org.uk/advice/grow-your-own/fruit/blackcurrants

and yes welcome back, how have you been?

Thanks both, very helpful as always!
I have been so very busy with our local community woodland. (Friends of Nant Fawr.org)
But I am definitely going to keep up with this site from now on.!