Olympics 2012 track cycling

3.2.042 During the final sprint, even if launched before the last 200 metres, *each rider* shall [B]remain in his lane up to the finish, unless he has at least a clear cycle-length lead and shall not make any manoeuvre to prevent the opponent from passing./B.
3.2.044 A rider passing on the right of his opponent, who is in the sprinters’ lane, may not crowd him or cause him suddenly to reduce speed.

Anna never crosses into Vicky's sprint lane.

Vicky puts her arm out first.

Anna puts her elbow out in response to Vicky's. As Vicky doesn't slow this doesn't breach rule 32044.

Vicky leaves her lane and slows Meares - breaching 32024.

You're welcome to watch my HD replay over and over again until you also agree with the commis.