Hello sauce59,
Thank you for participating in the Apple Support Communities! We understand that audio skips when playing Apple Music from an iOS device to a Sky Q box. We'd be happy to help take a closer look.
To help further isolate potential causes, we'd suggest starting with the troubleshooting steps outlined in the resource below:
If AirPlay or screen mirroring isn’t working on your device - Apple Support
Additionally, do you experience the skipping only when streaming to the Sky Q box or have you encountered it when playing music just on the iOS device as well? You may also want to try downloading an album or playlist to listen to offline, then see if the behavior still occurs when playing the downloaded music on the Sky Q box:
Add and download music from Apple Music - Apple Support
Keep us posted on the results.
Cheers!