This wasp was about 20 mm long with yellow markings on thorax and head. Scutellum was yellow as were parts of the legs. The abdomen was an amber colour and slightly dorso-ventrally flattened. Wings were clear.
My thanks to Tony D for identifying the genus and for the following information "Beautiful wasp! Features of note for Labium are the large hind claws, ovipositor just barely projecting in females (as seen here), antennae more or less semi-clavate, and head longish below eyes (shown in third pic)."