The Basking Shark is the second largest fish in our oceans - its relative the Whale Shark being the biggest. Despite their size, Basking Sharks actually feed on plankton which they filter out of the water, swimming slowly back and forth with their enormous mouths wide open. They are most commonly seen in the summer, when they gather in British waters. Try looking from cliffs or boats offshore in the south and west.
I'm guessing it's female, cuss her mouths wide open if u know what I mean ;)