Season 2012 More4 , 2012 Season 2014 More4 , 2014 Season 2015 Channel 4 , 2015 Season 2016 Channel 4 , 2016 Season 2017 Channel 4 , 2017 Season 2018 Channel 4 , 2018 Season 2019 Channel 4 , 2019 Season 2020 Channel 4 , 2020 Season 2021 Channel 4 , 2021