Over and out: F1 bans radio aid to drivers

Formula One's governing body has banned teams from sending drivers coded messages under a controversial clampdown on the use of radio communications from this weekend's Singapore Grand Prix.

The International Automobile Federation issued a follow-up on Monday to a technical directive sent to teams last week in which it gave more information about what they could and could not do during a race weekend.

Banned items on the list included "any message that appears to be coded".

Teams were told that the use of pit boards for such messages was also banned.

Other no-nos were answering a direct technical question over the radio from a driver, such as "am I using the right torque map?", and information about the level of fuel saving needed.

The FIA moved to limit radio messages after concern that drivers were getting too much help from the pit wall and engineers.