Gina Miller is a high-profile British political activist and businesswoman. She gets so many nasty messages and threats that she has had to hire security.
Alan works as a concierge. In his spare time he composes songs with political themes. But he also had a much uglier hobby: leaving nasty messages online – often hateful, racist and threatening.
At our request, the two agreed to meet. So what happened next? BBC Trending's Marianna Spring reports.
**This video was filmed in early March, prior to coronavirus social distancing measures.**