pre_text: Return on invested capital (ROIC) ROIC measures the after tax return on the total capital invested in the business. It is calculated as adjusted operating profit after tax divided by average invested capital. An analysis of the components is as follows:
table: 2019 2018
table: £m £m
table: Total equity 826.3 766.9
table: Net debt 334.1 235.8
table: Total invested capital 1,160.4 1,002.7
table: Average invested capital 1,081.6 992.9
table: Average invested capital (excluding IFRS 16) 1,061.2 992.9
table: Operating profit as reported under IFRS 245.0 299.1
table: Adjustments (see adjusted operating profit) 37.7 (34.2)
table: Adjusted operating profit 282.7 264.9
table: Taxation (80.6) (73.1)
table: Adjusted operating profit after tax 202.1 191.8
table: Adjusted operating profit after tax (excluding IFRS 16) 201.2 191.8
table: Return in invested capital 18.7% 19.3%
table: Return in invested capital (excluding IFRS 16) 19.0% 19.3%
question: Analyse this data from a financial earnings document. What is the change in net debt in 2019 from 2018?