text: * 2021 Royal Society Elected fellow
  * 2018 Gesellschaft Deutscher Chemiker Otto Roelen Medal
  * 2017 UK Catalysis Hub Sir John Meurig Thomas Catalysis Medal
  * 2016 Royal Society of Chemistry Corday-Morgan Prize
  * 2015 WISE Campaign Research Award
  * 2011 Bio-Environmental Polymer Society Outstanding Young Scientist Award
  * 2009 Royal Society of Chemistry Energy, Environment and Sustainability Early Career Award
  * 2005 Royal Society of Chemistry Meldola Medal and Prize
  * 2001 Royal Society of Chemistry Laurie Verangno Award
  Williams was appointed Officer of the Order of the British Empire (OBE) in the 2020 Birthday Honours for services to chemistry.