In an inconspicuous house in Guildford, Mycroft Holmes had already been working for several hours when he received his brothers e-mail.

At the sight of Dimmock's name and the irrefutable proof of his perfidy, the normally calm and unflappable government official snarled a few choice words half under his breath before reading the rest of the information.

He was relieved to hear that John's network were already looking for the two missing officers in Barrymore's known holding places, and Sherlock had also reassured him that he was making headway with the breakdown of the of the chemical binding the drugs. It was one less thing to worry about.

Turning from the computer he reached for the telephone.

Commander Stevenson, head of Counter Terrorism Command was waiting for this call.

"We have confirmation of the insider at the Yard." There was no satisfaction in Mycroft's voice as he named Dimmock as the traitor in their ranks.

"We are ready to move Mr Holmes," Came the Commander's soft reply. "Is there anything else we need to know?"

"I'll send you all the information I have. My brother is working with an ex-soldier who has suffered at the hands of the gangs, they have agreed to let us have any information they get."

"And their information is good?"

"Their information standard is the best."