the crowd seems well down pat going by your photos.
the guy on the 250 exc has done it every year since in his bare feet
4 years after riding a bike to the top of it he still feels bad about it.
Well, at the age of 34, I did it in 18mins whilst wearing slip on shoes.
I had to pause a few times. I ran on the paths and my joints knew about it. Yes: 12 mins is realistic for a young, fit fell runner.
Myke