What a horrible way to behave. However, "Guardian journalist" suggests that he's a regular or main writer for them. He's apparently a freelancer who wrote just three pieces for The Guardian over the space of five months, one in November 2017, one in December 2017 and one in April 2018. Nothing before or since.
www.theguardian.com/profile/andy-dawson
He has written much more for the Mirror but, again, nothing since April 2018.
www.mirror.co.uk/authors/andy-dawson/
Judging from the titles of the articles, he's not exactly high-brow, e.g.:
How to make cheese from your armpit sweat
Funnily enough, here's another of his from the Mirror:
How to deal with online trolls