Will they have a boy or a girl?

Over the past few months there has been speculation over the gender of the impending royal baby. So, what really are the chances of having a boy or a girl?

David Sirl, Assistant Professor in Statistics, joined the debate on BBC Radio Nottingham with Mark Dennison to discuss the probability of having a boy or a girl as well as the likelihood of having a large baby or whether they will look more like Will or Kate!