We were up reasonably early this morning and as the two terriers were turned out for a pee and synchronised barking rehearsal this rather odd cloud formation was spotted above the transformer box. We've got absolutely no idea what the name of this phenomenon is or what causes it to happen.
Maybe it's Casper the friendly ghost and his brother so if you have any ideas it's the usual 'answers on a postcard' please to the Two Terriers.