Don't forget that the Telegraph is an extremely conservative newspaper which is very cosy with the British establishment.
The key phrases in the article, "the Daily Telegraph can disclose", and "a senior security official said", imply that the Telegraph has been explicitly briefed knowing that it will big up the story. You know the quotation:
"You cannot hope to bribe or twist
(Thank God!) the British journalist.
But, seeing what the man will do
Unbribed, there's no occasion to."
Mind you, the fact that they're talking about drug gangs is especially significant as on the one hand it's an attempt to deflect attention from the political nature of GCHQ spying whereas on the other it's suggesting that GCHQ has a routine role in what would normally be considered police work. They're obviously proud of their mission creep.