No changes at half-time as the second half gets underway, with The Reds kicking towards the Forest faithful.
Corner delivered by Lansbury is punched clear by Randolph. Reds throw.
Antonio drives forward and earns a corner kick.
And his ball is cleared by the Blues defence.
Ben Osborn stands over a free kick ...
There will be a minimum of 2 minutes stoppage time in the second half.
Burke breaks away from the Blues defence but is denied by a smart stop from Randolph.
Blues attack results in a shot from David Davis that is dragged wide.
Randolph punches clear before Birmingham win a free-kick in their own half.
Lansbury to clip it into the box...
Reds earn a free kick 45 yards out.
Ten minutes to go until half-time...
Karl Darlow makes light work of a Demarai Gray attempt.
Lascelles clears a Birmingham attack and the Blues get themselves another corner ball, this time Cotterill's delivery fails to produce.
Cotterill delivers a corner that is punched clear by Darlow and out for another corner kick.
Caddis delivers a ball that deflects off the back of Danny Fox and hits the crossbar before Eric Lichaj clears for a corner.
Another good ball from Antonio is cleared by the Birmingham defence.
And Ben Osborn soon clears any potential danger.
Lascelles heads a David Cotterill cross out for a Birmingham throw.
Britt shoots high and wide from 20 yards with just over 25 minutes gone at St. Andrew's.
Eric Lichaj does well to dispossess Demarai Gray.
Ben Osborn's corner finds the head of Assombalonga who flashes a header over Darren Randolph's goal.
Forest looking the better side still, as Chris Burke wins a corner for The Reds.
Karl Darlow collects a tame cross from Donaldson and distributes the ball to Ben Osborn.
Demari Gray finds Clayton Donaldson who fails to beat Karl Darlow who makes a good save.
Low cross from Gray cleared by Mancienne.
Headed out by Birmingham, before Ben Osborn's ball from the second play goes behind for a goal kick.
Free-kick on the near side, level with the edge of the Birmingham box...
Despite falling behind, Forest have started lively and look positive going forward.
Fantastic goal from the Birmingham man, nothing you can do about those.
Cotterill runs towards the Forest defence before curling a 20 yard shot into the top corner past Karl Darlow.
Goal for Birmingham. David Cotterill in the tenth minute.