Smells like dirt this one... juvenile on 23rd July? Inevitably a juvenile Little Egret I imagine...
Birdguides have a big '?' beside the report, not the '!!!' used for a mega.
Obviously a juv Little Egret. The 'dark' primary tips on the first photo are perfect shadows cast in turn by each leading primary. Look at the direction of the light.
If you look at the second picture you will see that the black left wingtip is the shiny rock behind!!
Juvenile Little Egret.