@Mark262
You could try doing so through a manual entry in Sky Broadband Shield.
Sign in to Sky Broadband Shield.
Select Manage exceptions.
Enter the website you’d like to block and select Block.
Select Save settings.
https://www.sky.com/help/articles/sky-broadband-shield-sites-not-filtering-correctly
Unfortunately this may not prevent app access which doesn't use DNS resolution.
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Sky Glass 55" (on ethernet) & two Stream Pucks (one ethernet / one WiFi)
BT Halo 3+ Ultrafast FTTP (500Mbs), BT Smart Hub 2
