This beautiful moth is extremely well named, on summer nights you might see the male dancing its ghostly dance across your garden. He is trying to attract a mate with his rapidly moving wing beats whilst hovering & darting just above the vegetation.
The scientific name for this moth is Hepialus humuli. The female is more yellowy than the male (who is in both of my pictures here).
I used off camera flash to help me with these shots, manual focusing in the near dark was the trickiest problem.
For a different view, why not take a look at the wildlife trust’s page.