Season 1 BBC Two Season 2011 BBC Two , 2011 Season 2012 BBC Two , 2012 Season 2013 BBC Two , 2013 Season 2014 BBC Two , 2014 Season 2015 BBC Two , 2015 Season 2016 BBC Two , 2016 Season 2017 BBC Two , 2017 Season 2018 BBC Two , 2018 Season 2019 BBC Two , 2019 Season 2021 BBC Two , 2021 - 2022 Season 2022 BBC Two , 2022 - 2023 Season 2023 BBC Two , 2023