In 2010, teacher David Weston made an incredible decision.
He decided to come out to the entirety of Watford Grammar School, in Hertfordshire, England.
And now, four years later, a former student has got in touch with him to thank him.
Writing on Twitter, he said: ‘I came out as a gay teacher in a whole-school assembly in 2010. Today, four years later, I just received this email. Wow.’