It wasnt banned. Theybdidnt meet the advertisment requirments. Its false outrage to generate clicks. Its quite disappointing of them.
As someone who isn’t familiar with the UK advertising laws, is this
en.wikipedia.org/…/Advertising_Standards_Authorit… what you mean?

Advertising Standards Authority (United Kingdom) - Wikipedia
I think one of the big ones is the video referencing saying ‘pedophiles’ in the first 5 seconds. Possibly wasnt within the guidelines. Watch the video its extremely clear why it wasnt fit for broadcast and was never intended to be.