Question: What was the profit before tax when the turnover was 431.06?
Schema: create table table_2856898_1 (profit_before_tax__£m_ varchar, turnover__£m_ varchar, PRIMARY KEY (profit_before_tax__£m_))
SQL: select profit_before_tax__£m_ from table_2856898_1 where turnover__£m_ = "431.06"