"Most of it's too deep for success, and all the higher tunnels are soundproofed to hell and back, the ones we do more than walk though." Nix smirks. "They've had a bash, though, but London's too big - they keep putting 'em in the wrong area. Last I heard they were fussing around Finsbury Park way, and we haven't used those bits in about ten years. Be fair, though, Gryff'n'I did spend a couple of weeks nickin' the copper and circuitry out've their nice machines, which prob'ly didn't help. Made a decent profit, too."