I want to block a web site to my broadband

[Mark262]

How do I block tictok on my broadband

[TimmyBGood]

@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.