In other words, each laptop is part of a wireless mesh that relays the broadbandsignal from laptop to laptop so those out of direct range can still get a connection to the internet.
This is despite people in rural Wales being less likely to have access to super-fast broadband connections, a 3G phone signal and a choice of suppliers.
Power companies and networking startups have spent years touting a technology called broadband-over-power lines, or BPL. In those systems, the utility sends a data signal across existing wires at a much higher frequency than electricity, so the two signals don't interfere.
This is a signal and a reminder of the fact that there will come a time when mobile networks supplant traditional broadband as primary internet providers.