Quarter Sterling (millions) 2011-03-31 427 2011-06-30 451 2011-09-30 27 2011-12-31 23 2012-03-31 1 2012-06-30 1 2012-09-30 1 2012-12-31 1 2013-03-31 1 2013-06-30 1 2013-09-30 1 2013-12-31 1 2014-03-31 1 2014-06-30 0 2014-09-30 0 2014-12-31 0 2015-03-31 0 2015-06-30 4 2015-09-30 8 2015-12-31 4 2016-03-31 4 2016-06-30 5 2016-09-30 0 2016-12-31 11 2017-03-31 0 2017-06-30 0 2017-09-30 0 2017-12-31 9 2018-03-31 8 2018-06-30 8 2018-09-30 8 2018-12-31 42 2019-03-31 41 2019-06-30 49 2019-09-30 47 2019-12-31 43 2020-03-31 54 2020-06-30 54 2020-09-30 47 2020-12-31 43 2021-03-31 29 2021-06-30 22 2021-09-30 21 2021-12-31 25 2022-03-31 24 2022-06-30 15 2022-09-30 6 2022-12-31 2 2023-03-31 1 2023-06-30 0 2023-09-30 1 2023-12-31 1