It was an interesting documentary and followed the cab firm Addison Lee's call centre. Basically they were losing a lot of good valuable staff who never came back from maternity leave. They let the staff bring their babies in as an experiment and based their decisions as to whether it would carry on on a survey of all the staff.
The experiment found that babies did not affect overall productivity much, but when they reached 24 months they disrupted the work fliw.
Addison Lee to their credit decided to let the parents bring their small vabies and installed a nursery for the older ones.
http://www.hrmagazine...-staff-children-desks