American sources later concluded that this high-grade intelligence was based on forged documents.
The SDS was run by the Met and collected what the review called "high-grade intelligence" on protesters during "deep infiltration operations".
The real weakness of Operation Mincemeat was that there was just one body and that one suspiciously stuffed with high-grade intelligence.
It was clear the security forces had high-grade intelligence that indicated the attack was going to take place that morning.
These included persistent optimism, good humour, great patience and a sense of when to seize the opportunities that produce high-grade intelligence.
But at the same time as Scappaticci was overseeing the murder of state agents, he was providing RUC special branch and MI5 with high-grade intelligence on senior IRA figures and operations.
Over the next two years, he provided Barker with a stream of high-grade intelligence about other Yardies involved in a spree of murder and drug-dealing in London.
The bombs – capable of destroying underground shelters and command centres – would also suggest Russia is determined to bring the months-long siege of Aleppo to a speedy end, and that they have high-grade intelligence of the whereabouts of Syrian opposition positions.
Though it now appears to have been a journalistic cut and paste job rather than high-grade intelligence analysis, the dossier ended up being cited approvingly on worldwide TV by the US secretary of state, Colin Powell, when he addressed the UN security council on Wednesday.
Tunny was the top cipher-system, which carried only the highest grade of intelligence: messages from German army HQ in Berlin, army groups, high command, top generals and field marshals on all the battle fronts, even messages were signed by Hitler himself.
