John Cushnie's How to Prune, says:
"... Apricots fruit on 2 year old wood and older. Some fruit may form at the base of 1 year old shoots. Thin the shoots to leave them 15-20cm apart. Shorten side shoots back to 5 or leaves. After fruiting is finished shorten these shoots to 3 leaves. Where they have formed side shoots these are reduced to a single leaf. The unwanted shoots are pruned back to 5 or 6 leaves to carry fruit the following year. Prune out old unproductive branches without leaving a stump and train a young shoot into the space to replace it."
Hope that's helpful