Hellywelly4 - the murderer's name is Halliwell. Just add a 'y' :-((
PP; I'm not sure what to make of your critique. You say "the structure was very well done. One victim was a fallen woman, the other was a student." It wasn't 'structured' that way - it 'happened' that way. You also question Fulcher's honesty in asking a colleague not to mention the regularity of exploding bombs to his wife. That's not being dishonest, imho, unless she specifically asks the question and is then lied to.
You also make a point of Fulcher's future cases being open to question. I haven't read of any of his prior cases being put under scrutiny and, as his action was under circumstances no-one could consider normal, it would most likely never re-occur?
You mention that a judge's permission is needed for a defendant to defend themselves in court? That may well be so, but the fact this wasn't remarked upon is irrelevant. It is what happened.
If you read the book, you will see he was 'fired'. He writes, "I was sacked from my role on the national team and returned to force."
I fully understand where you are coming from as regards PACE and Fulcher's lack of adherence to it, but none of his superiors disagreed with his 'urgent interview' of Halliwell which led to the eventual discovery of Sian's body. It was only when Halliwell asked him if he wanted 'another one' that the rules of PACE were breached. However, in the book, he does ask the reader the question, what would you have him do if it were your daughter who was missing? I have 3 daughters and i know what my answer would be. And at the second trial (Becky Godden-Edwards' murder) that particular judge allowed the full testimony of Steve Fulcher to be heard.