That would be of the hawk-moth variety, Deilephila elpenor. The elephant in the name is not due to its size, though with a wingspan of one and half to two and half inches (45-60mm) it is quite large, but to the appearance of its caterpillar which has a trunk-like protuberance. The caterpillars like to feed on Rosebay Willowherb and bedstraws found in rough grassland, while the moth prefers to sup on the wing, from dusk till dawn, feeding at tubular flowers such as honeysuckle.
Before this particular Elephant hawk-moth was in the garden, it was in the utility room. We found it on the window blind, but decided it would be better off outside with the honeysuckle. It did not react to being moved or having its photo taken. In fact I think it was asleep. A very striking livery though, as moth colour schemes go.