How many major British awards for children's books did this writer, who wrote the  the second episode of the tenth series of the British science fiction television series "Doctor Who," win?  
Smile (Doctor Who): "Smile" is the second episode of the tenth series of the British science fiction television series "Doctor Who". Smile (Doctor Who):  It is written by Frank Cottrell-Boyce and was broadcast on 22 April 2017 on BBC One.
i don't know