Juvenile Common Terns - ID aid? (Sterna hirundo)

I hesitated before uploading this one. The high standard of most of the images posted here realy puts this one in the shade. But then, after a bit, I though, nah, post it. It shows the key ID points off pretty well, and not every bird you see poses for you like the crystal clear photo's in a field guide, especially here in the UK when chances are, you're birding in dull, drizzly, and poor light conditions.