The heavy London rain sounded like birdshot against the aluminium hull of the small corporate jet. Zak Chambers struggled not to bolt as wind gusts rocked it where it sat on the tarmac. Confined places didn't usually bother her, but any sound resembling weapons fire made her antsy. She flattened her back against the wall beside the open doorway and surveilled the area outside the plane. Satisfied that things were as normal as usual at Heathrow around dusk, she grabbed the sides of the door and leaned out, hoping the prickly raindrops that washed over her face and chest would restore a sense of control to her little piece of the universe.