The reason the BBC keeps reporting negative Brexit stories is because that's all there are. I've not heard anything positive about Brexit reported in any medium so far. Oh sure we have positive opinion about how this will be better and that will be improved, but very few independent reports about how things will have improved after 2019. All the reports I've heard so far are predictions of things getting worse, or where things actually have got worse. What's the BBC to do? Make up positive spin? That's the Government's job.