Being able to write your own scripts or PTC's (Piece to camera) is so important for a TV Presenter. Sometimes on a TV channel, the researchers or producer may have already written this for you however, I know a lot of TV Presenters who are on prime time channels who still have to write their own PTC's and often at short notice. This is especially the case if you are the TV Expert. When I was presenting a documentary in The Barossa Valley in Australia, which is one of the most beautiful places I've ever been, when driving along with the crew the producer asked our driver to make an unscheduled stop and for me to write a PTC on The Barossa Valley while they set up the camera equipment. I had around 10 minutes to research from my travel guidebook and write my PTC. It's another skill that the more you do it, the easier it gets.