From its very first episode, Slow Horses has been a show that excelled at withering put-downs – most often delivered by the series’ chief misanthrope, disgraced (and disgraceful) MI5 agent Jackson Lamb. In the Season 5 trailer he mercilessly skewers his team of fuck-ups: “Look what I’ve got to work with! Check out the trailer here:This season is based on Mick Herron’s novel London Rules, tangling Lamb’s team in another web of intrigue where the enemies may well be from fellow government forces, let alone outsiders. And since Ho’s new girlfriend kicks off the story, the tech guy gets a bigger role this time around. “‘Ho gets a girlfriend?