Formula 1 governing body the FIA has warned teams it will introduce new rear wing flexibility tests next month amid suspicions of rule bending. Mercedes' seven times world champion Lewis Hamilton flagged up the issue after qualifying for last weekend's Spanish Grand Prix, which he won. 'The Red Bulls are really fast on the straights. They have this bendy wing on the back of their car which they put on today and they gained at least three tenths,' the Briton told Sky Sports television. Red Bull team principal Christian Horner told reporters on Sunday his cars' rear wings had passed stringent tests and were legal. In a note sent to teams on Tuesday and seen by Reuters, FIA single seater...
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