The final countdown - and a mystery guest!

The final countdown is on!

In nine and a half hours we muster for the tour of a lifetime.

Make sure you set your alarm clocks!

Also, we have a special surprise for our tourers leaving first thing.

Here's a clue - if you're feeling sleepy our mystery guest will blow off the cobwebs! 

Special prize if you can guess who before 0830! Answers on a postcard - or just leave a comment below.