I've not got anything other than default settings in the subnet mask.
You can only have one disc connected to the router with the premium system, any other discs which for whatever reason also require an ethernet connection should be daisy chained off of one of the others, assuming that this is how you have yours setup then it sounds like a factory reset of one or other (or maybe both) is in order.
There will almost certainly be a method for backing up the router settings so that you can re-instate them with minimal effort and it would appear that there is also a way of backing up the Wholehome system
This function lets you save your Whole Home Wi-Fi settings such as disc and wi-fi network names.
If required, you can then factory reset your system and automatically restore your original settings, just follow the app instructions.
BT Whole Home Wi-Fi FAQs - Whole Home Wi-Fi app | BT Help
Yeah, the backup and restore worked fine.
Only 1 disc is connected to the router and the other disc is connected via WiFi backbone. The discs and WiFi all work fine in isolation.
And I've done a full factory reset on both discs and the problem still remains.
It's sounding more and more like a router problem especially as you say it works OK with the BT router
I think you might be right. Any ideas what setting I need to be looking for and checking on the Sky router?
You might be better off asking that question here The Official Sky Help Forum | Sky Community
Ha ha - I'm 100% sure they'll say it's a whole home issue too!!!
Try the product helpdesk.
If your product is within warranty:
By phone: 0808 100 6116
Monday to Friday 9.00am to 5.30pm
Saturday 9.00am to 2.00pm
By email: btconnectedhome@bt.com
If your product is out of warranty, please call the Technical Help and Support Desk on 0808 100 6116
@Cocksywrote:Ha ha - I'm 100% sure they'll say it's a whole home issue too!!!
Probably but you've already proved that the WholeHome system works with the BT router so you know that's not the case.
Which Sky hub do you have
The BT SH2 uses IPs of the range 192.168.1.x by default. So when you were using the BT SH2 did you either:
When the Sky router arrive it presumably was using IPs of the range 192.168.0.x ?
If so, it would clash with a. but mesh with b.
Or something along those lines.