HBO and Sky’s legal drama War has already cast its second season. George Kay ‘s show, which was given a two-season order from the off, has brought in Marisa Tomei  ( Spider-Man: Far From Home ),  Kelly Macdonald  ( Lanterns ) and David Harewood  ( Sherwood ) to lead the next case in the returning series alongside Richard Schiff ( Clemency ). Series two has rolled cameras ahead of series one launching later this year.  Joining the main cast are Claire Skinner, Omari Douglas, Kadiff Kirwan, Douglas Booth, Charles Edwards, Luca Pasqualino, Rebecca Front, Alexandra Maria Lara, Linus Roache, Violet Braeckman, Sasha Behar, Sid Phoenix, Cornelius Booth and Megan Channell.  Season 2 will see rival law firms Cathcarts and Taylor & Byrne take on an explosive defamation case.  Watch on Deadline The show’s first run will star Dominic West and Sienna Miller and is looking set to…