Williams co-founder Sir Patrick Head has returned to the team as they try to recover from a sobering start to the new season.
The 72-year-old is working on what Williams describe as “a short-term consultancy basis”.
The team were 1.3 seconds behind the next slowest car at the first race of the season in Australia two weeks ago.
Head left the sport at the end of the 2011 season.
He is renowned as one of the greatest engineers in F1 history, having led Williams to seven world drivers’ championships and nine constructors’ titles between 1980 and 1997.
This article is from the BBC Sport website / bbc.co.uk – Bahrain GP: Patrick Head returns to Williams