I think he'll fire Kelvin. Just because he should've been leader, chickened out, sat on the sidelines, making snide comments and doing naff all. Mainly he'll fire him because he's the celeb who needs 'bringing down a peg or two', i.e. the bad guy.
If this was a real life series Lembit would be fired as Hardeep and Kelvin atleast have a little potential. Lembit was useless and wet. But obvioulsy this is a one off firing, and there would be no fun in sacking a pathetic, but not unlikeable person. He's going to sack a baddie.