Sterling crashed a staggering 6% overnight to US $1.841. No-one knows precisely why such a huge drop happened and it has been attributed to algorithms responding to a speech yesterday by Francois Hollande demanding "tough Brexit negotiations".
The currency eventually rose to #1.23 but that's still 1.5% down from yesterday's level. Those residing here on UK pensions must now be worried about how low sterling can go, if they were not already concerned.
http://www.bbc.com/news/business-37582150