Williams F1's former title sponsor, At&T, has switched allegiance to reigning Formula One World Champions Red Bull.
The American multinational telecommunications giant became Williams' naming backer in 2007, but left the Oxfordshire based team after its dire 2011 campaign.
Red Bull announced in Monaco that the company has now joined the Austrian energy drink owned team as an official technical supplier.
"Red Bull Racing is excited to work with an innovative, global and reputable brand such as AT&T," said team boss Christian Horner.
OVER 18 YEARS OF SERVICE TO ALL PASSIONATE F1 AND MOTOR SPORT SUPPORTERS
Informing those in the know who want to know even more
Dedicated to Rudolf Ray +++ 14 April 2002 to 7 September 2007 +++