Eddie alerted in the matrimonial home, several hundred yards from where Prout murdered and buried his wife's body.
Actually, Adrian Prout murdered his wife in the family bungalow and moved her body to the back of his Land Rover before going to the pub. She was not strangled out on the farm.
There is no getting away from it that both Eddie and Keela were successful in several cases. However, that success is no guarantee that the alerts made to objects in Portugal were in any way sinister.
The link that you gave, John, was immediately after Prout's conviction and well before his confession.
It also neatly illustrates the difference between
intelligence and evidence.
As per standard English-court procedure, Eddie's alert in the investigation was not presented to the jury, because it was uncorroborated.
But using the alert (as
intelligence) the police hypothesised (we now know, an erroneous detail in a nevertheless
safe conviction) that Prout had strangled and murdered his wife
in the lounge of the matrimonial home.