Sorry, didn't see the posting from you and stuarty.
Cost is £200 as far as I am aware. You could check to make sure there is a slot on the 21st. It should be ok as several people have changed over to a week earlier at POL.
I am booked in at 9.30 and I know someone else is booked in at 11.30. It takes about an hour.
Your timing won't really matter as I am staying for a couple of nights in the pub next door.
I will be leaving on Fri 20th morning and returning on the Sunday night.