Hi @Anonymous User
Not familiar with your third party Router nor the Virgin Hub, but has a long shot double check the wifi channel numbers that is outputting on your ASUS Router on both 2.4ghz & 5ghz bands.
The reason i have mentioned this is because the Roku & NOW streaming devices only run on the lower wifi channel numbers and don't work on the higher spectrum channel numbers.
I can't remember the channel numbers off the top of my head, but it's something like 2.4ghz 1 to 13 and 5ghz channels 36 to 48 that the NOW Stick runs on.
I doubt this is the reason but worth checking anyway.
You could try also factory resetting the NOW Stick to see if the Stick can find your 2.4ghz & 5ghz Networks after the factory reset on the Stick.
To factory reset the Stick hold in the reset button on the Stick for around 15 seconds whilst switched on and setup the Stick again from scratch (making sure you use your existing NOW login details when asked for).
Hopefully somebody who is familiar with your ASUS Router or more IT Knowledge than me will offer further suggestions to try.
