There is an article in GW mag this month about Honey Fungus but i still can't find any fungus on my dying currant still not convinced the neighbour hasn't killed it with lawn weedkiller.
Even if I dig it out I'm not going to get all the roots out so the rose next to it, another susceptible species, could still catch it. If it was actually weedkiller it might revive in the spring. So I guess I'll risk it and just cut back the dead wood.