Posted: 06/06/2013 at 15:44
Sorry for not replying earlier Hogroast2. Have been very busy weeding and pruning these past few days. Unfortunately I can't enlarge the photos and they are too small for me to be able to recognise any diseases. However, I'd certainly advise you to prune that left fork away and now would be the best time to do it. Make sure to disinfect your saw after pruning and burn the prunings, otherwise the disease might spread.
I have to mention that, sadly there is a possibility that your apricot tree could die as they do not like to be pruned hard. It might therefore be a good idea to prune only the small shoot and ask what is wrong with it at a fruit tree nursery.