<p>The Government published a strategic outline business case for the construction of the ‘missing link’ between Oxford and Milton Keynes in September 2018 (available on the Department for Transport website). This showed a benefit cost ratio of 1.2 or 1.3 for the preferred corridor B.</p><p>Highways England is in the process of identifying potential routes within the preferred corridor which will enable a more thorough assessment of benefits and costs. At the current stage of work the estimated benefit cost ratio is not unusual.</p><p> </p>