Thanks @MrsCarson yes I know Porthmadog quite well, it's a wild area and gets very cold at night, you wouldn't want to be heading to Snowdonia without camping gear, also big drug problem in the area when I was there not so long ago and v easy to get hold of especially party drugs, so my fear would be these lads went there for a little party and lost control of their car
Praying they've just decided to treck Snowdonia and lost track of time with dead batteries and no signal but depending on what gear they have with them they would be in trouble from the elements soon if not already so hopefully they will appear today and get the mother of all bollockings from their (secretly hysterically relieved) parents
just because somewhere is in the UK doesn't mean that it's close to vicilisation, plenty of wild and remote spots in UK still that can be dangerous