pre_text: Trading profit The Group reported Trading profit of £128.5m in the year, growth of £5.5m, up +4.5% compared to 2017/18. Divisional contribution increased by £6.1m to £161.9m. The Grocery business recorded Divisional contribution growth of £8.3m to £138.3m while Sweet Treats Divisional contribution was £2.2m lower than the prior year at £23.6m. Group & corporate costs were £0.6m higher than the prior year. In the first half of the year, Grocery Divisional contribution benefitted from previous changes in the promotional strategy of Ambrosia. The business reduced the depth of promotional deals it offered which resulted in lower volumes and revenue in the period but growth in Divisional contribution. Additionally, Divisional contribution margins in the Grocery business grew 2.1 percentage points in the first half compared to the prior year. This is in line with margins two years ago, whereby margins in the prior year were impacted by a longer than expected process to recover input cost inflation seen across the Group’s categories.
table: £m 2018/19 2017/18 Change
table: Divisional contribution2
table: Grocery 138.3 130.0 +6.3%
table: Sweet Treats 23.6 25.8 (8.4%)
table: Total 161.9 155.8 +3.9%
table: Group & corporate costs (33.4) (32.8) (1.8%)
table: Trading profit 128.5 123.0 +4.5%
question: Analyse this data from a financial earnings document. What is the change in Group & corporate costs from 2018/19 to 2017/18?