Williams forced to revert to old wing

Both Williams drivers escaped unhurt from spectacular accidents in Monte Carlo - with a damaged front wing pitching Hulkenberg into the barriers in the tunnel, while a loose manhole cover broke Barrichello's left rear wheel and put him into the wall on the run out of Ste. Devote.

Williams has managed to manufacturer enough new parts to replace those broken in the accident - apart from the latest design of front wing.

Technical director Sam Michael said: "We've spent the past week or so manufacturing new parts in readiness for Istanbul after the damage we sustained in Monaco.

"All of the items that needed replacing have been replaced now, apart from the front wings which require more time. As a result, we have to revert back to a previous specification for this race and wait until Montreal for the updated version."

Despite the setback on the front wings, Williams is hoping for a performance boost from Cosworth - which has made further progress with the driveability of its power-units.

Michael added: "Cosworth have been working hard on the issues we have been seeing during the first part of the season and have had some positive indications from their dyno work.

"Istanbul will be an opportunity for us to test how these solutions look on the track. In line with our development programme, both FW32s will have new brake ducts for Istanbul and some additional mechanical changes."