[Stooky Bill]

Something quite different, from the above, but again, forcing changes to programmes, was the day in November 1990, when Mrs Thatcher resigned as Prime Minister. In this video, you'll hear Nicholas Owen at ITV saying they would be staying on the air for the latest updates. This meant dropping "The Time The Place" and "This Morning", and I'm sure programmes were dropped on BBC1. 

Here's what happened on BBC1 
www.dirtyfeed.org 

I've seen the coverage from that morning and as said in the article they had a newsflash into People Today, then at 10am they went to the news and stayed with it. The odd thing is that the presenters finished that hour saying that they'd be back later and Children's BBC was after the news.... only to be contradicted by Judy Spiers, who was doing the in-vision continuity for the morning.