“3. Bonus You will be entitled to a guaranteed bonus of£6,200,000 . . . payable in your first year of starting employment . . . In your second financial year of operation starting on1 April 2008 , the bonus calculation will be based on an EVA formula calculated as 40% of EVA generated by the Equity Derivative business. . . . In the third financial year starting on1 April 2009 and thereafter the bonus calculation will be normalised based on a formula calculated as 30% of EVA generated by the Equity Derivative business. . . . ”