Route Grade Votings
The gap had to be filled but the result never gets done. Start direct (or up Billy Whizz), arrange side-runners then gain a small ledge. Leave this and climb the wall left of Billy Whizz to finish.
I actually think you start up Billy Whizz and step left. If you finish direct from the ledge up the thin crack the grade is E6. Not sure where the finish 'up the wall just left of Billy Whizz is' if its not this crack.