We are also in Norfolk (West near Downham Market) and already have a ton of currants on all our bushes (except one that seem to have died for no apparent reason). The redcurrants are already starting to turn slightly pink. Redcurrants in particular don't seem to have a proper flower, it's more like a little pea pod that matures into the currant. You might still get fruit. Whereabouts in Norfolk are you, Terry, if anywhere near us you are welcome to some cuttings off my bushes I grew them all that way and, in our fen soil at least, they grow very quickly.