The issue was definitely with the old router. Sky engineers were here today and tried again but the Q box just shut down with the same “technical fault”
Tried a different router - same Q box - and it works perfectly.
Nice that it’s sorted. The only thing the router can fuck up is the ports that need to be open; the Sky box should document what it needs. A “technical fault, computer says no” is fuck all use to anyone!
Which is what I’ve been trying to tell Sky for the last 30 days since the Q box was originally installed. I was still able to use the box to watch my subscribed channels but only when it was disconnected from the router. Couldn’t use any apps, catch-up, download programmes etc.
Sky said the (sub-contract - IsleSat) engineers were at fault and the engineers said it was because the box wasn’t “compatible” with my old router. It appears the engineers were right.