"Ruby-tailed wasp, but which species?! ID please!

Observation - "Ruby-tailed wasp, but which species?! ID please!. Description: Found this wasp a few years ago, it has metallic-blue-green colours, with a bright-red, but not metallic, tail.

Found this wasp a few years ago, it has metallic-blue-green colours, with a bright-red, but not metallic, tail.