Original sentence: In addition to Ofcom's requirements, some channels have also adopted their own systems:.In the United Kingdom there is no general TV rating system as the television regulator, Ofcom, sets clear boundaries for what can be shown and when.On main broadcast television, this is 9pm, however on subscriber television services it is 8pm.The most obvious example of this is in the watershed, the time after which more explicit content can be shown
Edited sentence: , however on subscriber television services it is 8 p.Also of note, the WWE Friday Night SmackDown.However, due to the rise of some children atttempting to watch programmes that are strictly not intended for them, such as when South Park first came out, many children thought it was for them due to it being animated (children are mostly attracted to animation) and being completely unaware of its adult content, many people believe that the UK should have a TV age rating system and feel that the watershed does not help.In the United Kingdom, TV ratings are usually considered unnecessary; the television regulator, Ofcom, sets clear boundaries for what can be shown and when.On main broadcast television, this is 9 p.Surprisingly, some channels have adopted their own systems.The most obvious example of this is in the watershed, the time at which more explicit content can be shown.show shown on Sky Sports 3 retains America's TV-PG rating, and shows the logo in the top corner, even though the announcement made by Sky before every broadcast contradicts this