Wolff hits out at 'Teletubbies engineers' amid blue flag system failure

Mercedes team principal Toto Wolff has criticised "Teletubbies engineers" as Oscar Piastri labelled backmarkers "unacceptable" after he made contact with Carlos Sainz at the Hungarian Grand Prix.

In the second half of the race, the leaders found it tricky to navigate lapped runners and it has since emerged there was a problem with the blue flag system which led to physical blue-waved flags and panels being the only way drivers knew about upcoming front-runners.