Unknown moth

Unknown moth

Observation - Unknown moth - UK and Ireland. Description: Pair of brown and black moths; some kind of hawkmoth? About 2inches long. Photographed during the day resting on a fence. Can't find it in my small, and therefore limited, book of British butterflies and moths. Anyone know what this is?

Pair of brown and black moths; some kind of hawkmoth? About 2inches long. Photographed during the day resting on a fence. Can't find it in my small, and therefore limited, book of British butterflies and moths. Anyone know what this is?