A friendship written in 50,000 letters
Ninety-seven-year-old Mary has been writing to her best friend Cathy every single day for 77 years.
But Mary and Cathy had a vow, to burn all the letters once they'd read them.
The pair exchanged more than 50,000 letters between them, but none was saved.
Mary has been living in a Barchester care home for the past 10 years.
Reporter: Rachel Coburn; Video Journalist: Mai Noman