SIR MENZIES CAMPBELL, 64 
The deputy leader and foreign affairs spokesman, who is now acting party leader, was the first to confirm that he will stand in the leadership contest.
A former Olympic runner and eminent Scottish lawyer, he was recently given the all clear after treatment for cancer. He is the oldest candidate.
Was among those thought to be unhappy with Mr Kennedy's performance before his resignation, telling him he had to "raise his game".
But he was also among the first to pledge his loyalty when Mr Kennedy initially announced a contest and won some applause at the first hustings when he promised to welcome the former leader back to the party's front benches.
Outlining his approach to party activists, he said: "I want new thinking to liberate thousands of families locked in poverty. I want new thinking to reward environmentally friendly technology."