Terry Deary's remarks seem to me rather one-sided. As a long-term contributor to his 20 millions sales I have recommended his books as a hook for children to become interested in history. Once fascinated children's interest can be kept by teaching how the past (places, events and people) relates to their lives. Only then should the academic rules polish off that interest for those who intend to enter the professional field. This is the stage where facts and fiction separate. For the interested amateur a grounding in history is a life-time interest and so useful for local and family history seekers. The ability to analyse and interpret information is a transferable skill.
I failed my O level History - the Wars were to blame

- whilst reading about the Tudors and Georgians. Now, as a graduate in Scottish Historical Studies, working in the heritage tourism industry I disseminate historical information for a living- and I do it with a passion. I was traumatised to know that my passion would upset the author whose books lined full shelves in my child's room! I do however agree that the politicians are not the ones to set the curriculum. I have long believed that any subject that does not contribute to the GDP of the economy is deemed irrelevant by government. Hence the reduction of history in the school curriculum and the variety of subjects and periods included. Saying that there are less exams taken in the subject is to ignore the fact that there is less of it taught. My school had no pupils taking Russian language - for the simple reason it wasn't taught!!
Andrew Marr's opinion that chronology is essential is far more nearer the mark. How many people can recognise the threads that lead from the Reformation to the Battle of Culloden? Integral to chronological understanding is the regionalisation of history. Taking the UK as an example, the chronology of a period has different perspectives depending on whether you lived in Wales, Ireland, Scotland or England. Teaching that there are 2 sides to every story is a fundamental aspect to life itself. Understanding the past leads to greater understanding of the present.