Yikes, just seen this and have to say that we were wildly over ambitious in our expectations about getting through the Creosor to Rhosydd through trip inside 12 hours with 14 people.
Although our backup call was made as arranged we were all about safety and that consumed even more of our precious time, we didnt go underground in flipflops and bermuda shorts as has been suggested by some
our only mistake was time management.
we have made a collection for the rescue services who were prepared to carry out a rescue if we had needed it and we are very very grateful.
here is some video of the trip if anyone wants to see it, it is long but shows that we were prepared.