Horntail or something else?

Horntail or something else?

Observation - Horntail or something else? - UK and Ireland. Description: This emerged from the container I'd been using to rear some micro moths last year (they were fed on apple leaves). I realise it might be difficult to identify this from just a picture of its underside but that's the best photo I could get.

This emerged from the container I'd been using to rear some micro moths last year (they were fed on apple leaves). I realise it might be difficult to identify this from just a picture of its underside but that's the best photo I could get.