Well, when we say special, it doesn't mean to imply that the people already on the bill are not special. Indeed, their specialness is beyond reproach. They have a track record of being special, and a track record which is a better track than Raltrack. Specialness oozes from their every pore. So, if I suggest that the special last minute addition is in any way more spacial than they, I shall be demeaning their specialness, and this I would not wish to do under any circumstances.
So, with that very important reservation, the special last minute addition is....
... Daniel Kitson.
I trust this meets with your approval. Because it does mine.