11.50am this morning, downing street security gates have swung open, the motorcade swept in, heralding another new arrival here. here he comes, rishi sunak, walking up downing street alone to the podium to address the country for the first time as prime minister. i have just been - to buckingham palace | and accepted his majesty the king'sj invitation to form a new government in his name. news bulletins on tv and radio are always done live. now, most of the time everything goes smoothly, butjust occasionally, it doesn't. one night, a group of protesters invaded the six 0'clock news studio, and i ended up sitting on one of them. this heralded another new arrival. 0n the air. 0h, bleep.