Just had a mate share a page on facebook; please look at Llanberis Mountain Rescue page (sorry cannot get link to work on a mobile). They have dropped a sack with lots of gear. The map shows the potential fall line and they're asking for help.
https://www.facebook.com/llanberismrt/posts/2485576224848784
Ta!! Not the greatest technophile. Am hoping the 6 contacts theory might prove fruitful.
Rucksack found, sounds like they've had some challenging times.