Look it up - There is evidence of Thermite in the dust from samples looked at by scientists all over the world.
Who told the BBC that building 7 had collapsed? - Exactly
Why did they tell the BBC ahead of time, why not just let them report it as it happened? Exactly
Why did the BBC need to know at all? They report the news dude so ...
No, Im not looking anything up, its up to you to provide the evidence, I know you don't have any that's why you want me to look for it, you are just parroting what all conspiracy theorists say, "do your own research"
Let me give you a scenario regarding building 7
there were multiple media outlets clamouring for stories that day, lots of reports coming in on Chinese whispers, lets say they got a report of building 7 having the fire service pulled because it was likely to collapse, that then got incorrectly reported as the building had collapsed.
Now, that's my theory, now do you have anything else likelier than that using Occams Razor (Google it)