As far as I am aware Dr Amaral never mentioned the confusion or the frustration which the various British organisations are claimed to have caused. One would have thought that if things were as bad as Jim Gamble suggests that Amaral would have had a field day in apportioning blame elsewhere.
Could it be that this is merely a British perception by the author of a report who as head of CEOP was himself competing with other organisations?
More from Chapter 6 of Truth Of The Lie describing the plethora of English police and other agaencies who arrived:
"Two days later, English colleagues begin to arrive. The main idea was for the English police to place at our disposal two specialists in family supervision and support to be the link between the Portuguese investigators and the McCanns. The National Directorate of the PJ had authorised the arrival of these police officers in the context of international collaboration. Bob Small, an officer from the Leicestershire police, and one of his colleagues meet us to take stock of the situation and evaluate the needs of the investigation before making contact with the couple. ...
... Then the two police officers arrive who are assigned to psychological support and communication with the family. Little by little, the number of English police officers grows exponentially. We place at their disposal a room next to our crisis unit, Task Portugal. These are specialists from various police services, including Scotland Yard. Special surveillance teams as well as information and telecommunications technicians turn up with their laptops and various high-tech equipment. Others will come to join us, notably profilers: they will develop a profile of the alleged abductor from which a number of possible scenarios will be constructed. The analysts trace timelines and patterns of connections based on the witness statements gathered. They produce giant summary boards that cover the walls of the offices. They attend all our meetings and collaborate in decision-making. They are the intermediary through which requests for information are sent to Great Britain, and it is they who receive the responses and enquiries."
It's difficult to count just how many English police and similar agencies turned up - the above quote from Mr Amaral's book mentions only some of them - there were actually even more than that.