Quarter Sterling (millions) 2011-06-30 20 2011-09-30 -419 2011-12-31 -4 2012-03-31 -22 2012-06-30 0 2012-09-30 0 2012-12-31 -1 2013-03-31 0 2013-06-30 0 2013-09-30 0 2013-12-31 0 2014-03-31 0 2014-06-30 0 2014-09-30 0 2014-12-31 0 2015-03-31 0 2015-06-30 4 2015-09-30 0 2015-12-31 -4 2016-03-31 0 2016-06-30 0 2016-09-30 -5 2016-12-31 11 2017-03-31 -11 2017-06-30 0 2017-09-30 0 2017-12-31 8 2018-03-31 0 2018-06-30 0 2018-09-30 -1 2018-12-31 33 2019-03-31 0 2019-06-30 7 2019-09-30 -3 2019-12-31 -1 2020-03-31 8 2020-06-30 0 2020-09-30 -6 2020-12-31 -3 2021-03-31 -13 2021-06-30 -7 2021-09-30 -1 2021-12-31 4 2022-03-31 -1 2022-06-30 -10 2022-09-30 -9 2022-12-31 -5 2023-03-31 -1 2023-06-30 0 2023-09-30 0 2023-12-31 0