White Admiral and wasp

White Admiral and wasp

Observation - White Admiral and wasp. Description: While looking for white admiral in Broxbourne Woods on 1st July I noticed a w.a.in a clump of bramble hanging upside down from a dead (?)wasp and feeding on it.The wasp seems to have been killed (?) and wrapped in silk by a spider.Both insects were suspe

While looking for white admiral in Broxbourne Woods on 1st July I noticed a w.a.in a clump of bramble hanging upside down from a dead (?)wasp and feeding on it.The wasp seems to have been killed (?) and wrapped in silk by a spider.Both insects were suspended by a thread from a leaf.Can anyone offer an explanation for this behaviour which I have never seen before in many years of butterfly observation?