London Rivers Week is a week-long annual campaign inspiring the public to celebrate all of London’s rivers and the many projects taking place to protect them.. Organised by Thames 21. "London Rivers Week talk by Professor Sir Dieter Helm on solutions to fix our broken water system - plus special guest Professor Christian Dunn. Special guest will be Professor Christian Dunn - wetland scientist and Associate Pro-Vice Chancellor for Sustainability at Bangor University. Professor Dunn will be staying for a Q&A session to answer your questions."