Thanks Pete

When I'm teaching staff, I'm at pains to point out that a cellphone is an admin tool not a safety tool. Due to the propagation of UHF it ceases to be reliable after you have crossed the first ridge from civilisation. 80% of the calls received may have come from a cellphone, but what percentage of calls never connected? That said, cellphone is much better than nothing, but people need to recognise how very limited it is.

Matthew