It would appear that one of the two Ubiquiti NanoStation Loco M2′s that I purchased has suffered a fault.
I reset it to factory defaults and upon it restarting I noticed that I could only get a ping of about 4-5 packets every 60 or so seconds. It never stayed up long enough for me to get back onto the web interface to configure it again.
Attempted a recovery using tftp etc and got it to accept the firmware via tftp, at which point it reboots post the loading. Once again goes into the same condition. I’ve now submitted it for RMA and will set about sending it back.
Not really my luck with hardware sometimes.