WILLIAMS' HIGHS AND LOWS
Williams finally announced on Thursday morning that it had secured a supply of Toyota engines for three years from 2007.
The deal marks another significant landmark in the team's Formula 1 history, so what better time to chart the highs and lows of the Grove-outfit's time in F1...
July 2006 - Williams signs with Toyota
Williams ends months of speculation by signing a three-year engine deal with Toyota from 2007. The team currently lies a distant eighth in the constructors' championship and is on its worst run for over 20 years.
Williams turns to Cosworth for 2006
After ending its relationship with BMW early, Williams turns to Cosworth and its renowned knowledge of V8 engines. Season starts well, but unreliability costs team valuable points. Engine blow-up ends Webber's chances of victory in Monaco.
Brazil 2004 - Final hurrah for BMW Williams
Williams comes close to snatching 2003 titles, but relationship with BMW deteriorates over next two years, eventually leading to a split at the end of '05. Juan Pablo Montoya's final round win a year earlier was the last for both Williams and BMW.
2000 - New century, new era for Williams
It was new livery, a new British driver and a new engine for the team at the turn of the century. Although Jens only stays the one year, a top BMW engine helps Williams return to the front. Ralf Schumacher takes the first win in 2001, but team can not get the better of Ferrari over the long run.
1997 - JV takes team's last title as Renault departs
Who would have thought it would take Williams four years to win another race after five constructors' and four drivers' titles in six years? Renault's exit from F1 at the end of '97 leaves the team with rebadged Mecachrome engines, thus ending a successful era.
1996 - Damon and Williams dominate
With his nemesis Michael Schumacher out of the title running in his first year at struggling Ferrari, Damon Hill and Williams paint the 1996 season blue and white. Hill and new team-mate Villeneuve take 12 wins as team cruise to another constructors' title.
1992 - Mansell takes first title for Williams-Renault
After rejoining the Grove squad in 1991, Nigel Mansell used the superiority of the '92 Williams to finally claim the drivers' crown. He set a then-record of nine victories in a season, winning the year's first five races, as well as securing 14 poles.
Canada 1989 - First win with Renault
The start of a golden era for Williams and its French engine supplier. After the disasters of the previous season, Thierry Boutsen masters the wet conditions in Montreal to score the first Renault powered win. He also wins final round in Australia.
1988 - Judd fills the void left by Honda
Honda's decision to switch to McLaren after five years with Williams, left the team with underpowered Judd engines for 1988. After two consecutive constructors' titles, the Grove squad endure a tough season. Mansell joins Ferrari for '89.
1987 - Piquet's drivers' title secures double
Brazilian Nelson Piquet took Williams-Honda's first drivers' crown in 1987, as the outfit secures it's second consecutive constructors' title. However the Anglo-Japanese relationship was to come to a sudden end at the height of its success.
1984 - Rosberg takes first win for Honda
Dallas '84 was the scene of Honda's first win with Williams. Finn Keke Rosberg was the man behind the wheel of the FW09B at the US circuit. He won again a year later, after Nigel Mansell had joined him as team-mate.
1980 - Williams' first world champion
In 1980 Australian Alan Jones became the team's first world champion. The Williams-Ford FW07B also secured the outfit's first constructors' crown, which it retained a year later.
Silverstone 1979 - First win
Williams secured its first win at Silverstone in 1979. Clay Regazzoni was the man who delivered the goods for Frank Williams on the team's home soil. Some 112 wins have since followed.