Great Spotted Woodpecker seeks new home!

For those of you who didn't see my post on Facebook, the other day I was lucky enough to be able to grab my camera in time to snap this woodpecker checking out the nest box which hasn't been occupied since it was put up three years ago, apart from one cold night when some blue tits took shelter in it. I do hope something nests in it this year. It would be thrilling if it was the woodpeckers!