From Sky Sports Website, Ted Kravitz seems convinced all was legal.........
SKY SPORTS
However, it's understood that the governing body are confident that Vettel's move was legal.
While the footage certainly throws up doubt about its legitimacy, a partially-obscured steward at the exit of the pitlane can be seen waving a green flag just before Vettel rounds the Toro Rosso.
"It was actually a trick of the TV screen," Sky F1 pundit Ted Kravitz told Sky Sports News. "All the attention is on the light panels which are around the circuit and they supplement the marshals' flags that you get on any track. And if a marshal holds out a yellow flag, then you are not supposed to overtake and that is what people thought they were seeing.
"But actually the green light board was in the wrong place - there was a marshal flag before it saying that the danger zone had passed and we have had that confirmation from the FIA today that no infraction ever took place, they were satisfied at the time that Vettel did not overtake under yellow flags and as far as they are concerned it is case closed."