Mary Berners-Lee: An unlikely fraud victim

Courier fraud is a highly complex telephone scam that police believe to be among the most sophisticated they have ever had to face - and it is on the rise.

As crime victims go, a 90-year-old pensioner might appear typical.

But Mary Berners-Lee is a highly regarded mathematician who helped create the world's first commercial computer, the Ferranti Mark I. She is also the mother of Tim Berners-Lee, the man who invented the world wide web. Yet even she was outsmarted by the courier scammers.

Here, she tells BBC Watchdog how she fell victim to the scammers.

BBC News