LONDON   British Prime Minister Keir Starmer on Thursday ended his boycott of US social media company X, saying the company is “acting to ensure full compliance with UK law.” With a post on the platform on Thursday, Starmer returned to US billionaire Elon Musk's X for the first time since Jan. 8, when he stepped back from the site amid controversy over its AI tool, Grok, and the creation of non‑consensual sexualized images of women and children. "Free speech is not the freedom to violate