Well researched, well written and credible. However, I would draw the author's attention to one factual error. On page 54 of the Kindle edition it states that York is to the west of Manchester in the UK. This is not correct. In fact, York is to the north-EAST of Manchester. Can I suggest that it may be better to use London as a point of reference when correcting this in the next edition. I say this because, compared to Manchester, more of the readership will know where London is. By the way, York is some two hundred miles driving distance north of London.