I had the privilege and pleasure of going out with Mark for both the WC session and the Megane / AX session later in the afternoon
and that corner was one that was tried a number of different ways!The conclusion was that by braking before the chicane, you could keep left coming out of it and then be on the power all the way through the right immediately after it and down the long right hand high-speed sweeper, the idea being that if you can get out of the corner before the longest period of acceleration at a higher speed, you'll make up more time than you otherwise would.
And with no-one else seemingly coming close to his pace, I can vouch that it seemed to work!
