Thanks to everyone who came along to the Microsoft event today at Modern Jago. I hope you all found it useful. I got feedback from a few people that my tip on not trusting company WIFI when trying to do remote debugging of Windows RT devices was useful (or any other type of device for that matter).
I have seen too many corporate level Wifi implementation, and a surprising number of home ASDL/Wifi routers, doing isolation between WiFi clients. So each client can see the internet fine, but not any another Wifi devices. My usual solution is as I did today, use a MiFi or phone as a basic Wifi hub, they are both too dumb to try anything as complex as client isolation. Or look on your Wifi hub to check if you can disable client isolation.