"Use the Simple Present to express the idea that an action is repeated or usual. The action can be a habit, a hobby, a daily event, a scheduled event or something that often happens. It can also be something a person often forgets or usually does not do." http://www.englishpage.com/verbpage/simplepresent.html I would say this falls under "scheduled event" or "something that often happens." This week's news on BBC comes from a train. Today on BBC, like every week that we have scheduled broadcasting, our news comes to us from a reliable source. Hope this helps. I tried forming a few sentences that would work with present perfect here, but they don't feel natural to me.

"It's look more like unfinished action in present so why don't they use Present Perfect?" It is talking about a presentation of the news of the week, available on their site. Such things are presented to the visitor in an "on demand" fashion - only when the visitor clicks something, it starts. So it is not an "unfinished" action because it doesn't even start until the user activates it. Yes, the news content has already been produced, but the sentence is saying it "from the user's point of view". For the user, the news is just waiting there to be activated, never been started before. It has no "past". And when there is no past involved in any way, present perfect is totally out of the question.

The language used here is quite formal in style but nonetheless correct for a scheduled event. As a more relaxed possibility you could use the present continuous for a temporary action "...which is coming from a train." Best wishes Bob

disregard my comment, I misread your question

I'm not native but where do you see a present perfect there? at least in the sentence you quoted it is just "it comes" (with it being The English) which iirc is simple present