What was the change in Total taxation charge in 2019 from 2018?
{"": {"2019": "\u00a3m", "(Restated) 2018": "\u00a3m"}, "Profit before taxation": {"2019": 242.2, "(Restated) 2018": 210.7}, "Tax on profit on ordinary activities at the standard UK corporation tax rate of 19% (2018: 19%)": {"2019": 46.0, "(Restated) 2018": 40.0}, "Expenses not deductible for taxation purposes": {"2019": 0.3, "(Restated) 2018": 0.8}, "Income not taxable": {"2019": -1.7, "(Restated) 2018": "\u2013"}, "Adjustments in respect of foreign tax rates": {"2019": -0.1, "(Restated) 2018": -0.1}, "Adjustments in respect of prior years": {"2019": "\u2013", "(Restated) 2018": -1.1}, "Total taxation charge": {"2019": 44.5, "(Restated) 2018": 39.6}}
total_taxation_charge_2019 = df["Total taxation charge"]["2019"]
total_taxation_charge_2018 = df["Total taxation charge"]["(Restated) 2018"]
answer = total_taxation_charge_2019 - total_taxation_charge_2018