Audio completely out of sync

[Bob-]

Trying to watch the darts, as I do every year, via the Sky Go app on PC.

When launching the stream, the audio starts with an advert (just audio no picture, not the same every time, but always starts streaming advert audio) then switches to the darts audio but it is about 10 seconds out of sync. It doesn't correct after leaving it on.

No matter how many times I re launch the app/stream, reinstall, clear any cache, try a different user profile, difference machine, different OS, check for updates, change auto-play settings/subtitles etc. The issue remains. 

[caesarome]

I have just checked Sky Go on my PC and I see something similar on the darts, not 10 seconds but a second or two out of sync.