Quieter start to the second half at the Riverside.
The home side need a win to close the gap on second-placed Sheffield United to a point.
Riley McGree tests away goalkeeper Jack Bonham with a free kick.
GOAL: Watford 3-0 Birmingham
Britt Assombalonga (74 mins)
QPR make a trio of subs and they've now made all five of their allotted changes.
It's just damage limitations now.
League One update
#bbcefl
A glimmer hope for Morecambe with a goal from Donald Love thanks to an excellent finish, but Charlton still lead 3-1 at Mazuma Stadium.