Rules & penalties · Updated for 2026
The F1 black-and-white flag explained
The formal warning for unsportsmanlike driving before a further infringement brings a penalty.
Quick answer
The diagonally divided black-and-white flag is a warning to a named driver for unsportsmanlike behaviour. It is not the chequered flag and does not end the session.
What it communicates
The warning tells the driver that their conduct has crossed the acceptable line and that repeating it may result in a sporting penalty.
Common context
It can appear after repeated track-limits offences or other behaviour covered by the current regulations and stewarding guidance. The exact trigger depends on the offence.
Do not confuse the patterns
The chequered flag uses a grid of black and white squares and marks the finish. The warning flag is divided diagonally and is paired with the driver's number.