Only just had chance to look at teh log file.
Didn't last long.
12 Jan 2017 11:38:34 Recording started
12 Jan 2017 11:38:44 IP address is now 78.149.212.252
12 Jan 2017 11:39:41 Unable to login to modem/router
12 Jan 2017 11:40:38 Unable to login to modem/router
12 Jan 2017 11:41:38 Unable to collect stats 3 or more times in succession
To the extent that it looks as though it failed 1 minute after recording started.
I'm struggling opening a telnet session off the MAC, but will try of the Win8.1 laptop later.