In reply to scope:
Thanks for the info. The guidebook team were aware of two other rockfalls between the Great Cave and the Promontory, one of which may make escaping from The Promontory hazardous. We have been refused access to check until the birds have flown so the guidebook will just carry a warning.
These new falls have taken out the start of Yard Trimmings (F6b+) which traversed into The Blue Grotto Cave from the right as seen in the photo. It is harder to tell if the left side of the cave traversed by Magical Mystery Tour (extension or Part 2) is affected from these pictures.
Whilst the guidebook is looking finished we are waiting on adverts and some tweaks before it goes to print, so you'll be waiting a few more weeks.