His online biography mentions that he's appeared at a royal wedding in London, at the Tate Modern and the Chinese embassy, where he campaigned against the detention of the artist Ai Weiwei, and at Supernorma l festival in Oxfordshire.
A little further digging reveals that white rabbit is the alter-ego of Spike McLarrity, a "live art durational performance artist".
"My work deals with my own autobiography," he writes, adding that his appearances as the white rabbit aim to "find a new way to reach a different audience and to bring fine art and performance together."