Large wasp-like insect

Large wasp-like insect

Observation - Large wasp-like insect. Description: A large (30mm long) yellow & black wasp-like insect entered conservatory with ungainly flight. Didn't stay still long enough for decent photo. Two wings, I think, and long ovipositor making it look fearsome. Eventually found door & flew off at speed about

A large (30mm long) yellow & black wasp-like insect entered conservatory with ungainly flight. Didn't stay still long enough for decent photo. Two wings, I think, and long ovipositor making it look fearsome. Eventually found door & flew off at speed about 5m above ground.