When you go in-house you become part of a multi disciplinary team—all charged with running a business—so your role is not to explain the ‘why not’, it’s coming up with the what, the how, the options, the risk assessment or trade-offs, and then—and this is critical—communicating clearly and concisely. I always keep in mind the brilliant quote, “I would have written a shorter letter, but did not have the time”.