MSPs had earlier been told by SteveWalker, operations director with Stagecoach, that a "wider problem" for bus firms would be getting to the bridge from both sides of the Firth.
However, in the district of Former State Assembly Speaker Mike Huebsch, now working in the Walker government as Secretary of Administration, Democrat Steve Doyle took 54% of the vote.
Mahon fluffed a golden chance in the 10th minute, shooting over with only Walker to beat, and that was the signal for Walsall to show their attacking teeth through Steve Corica.