That was a normal occurrence each year.
Newts are partial to dragonflies like this dead chaser in the same pond in an earlier year. See https://sussexrambler.blogspot.com/2013/06/broad-bodied-chaser-dragonfly-corpse.html
Perhaps this newt was simply looking for an egg laying dragonfly. Its behaviour remains a mystery.
Click on any picture to expand it.
http://www.peterlovetttalks.co.uk/product02.html for my talk on Dragonflies and damselflies.