Cook egg noodles according to package directions.
Meanwhile, melt butter in a large skillet over medium-high heat. Add onion and cook 3 minutes until soft. Add mushrooms and cook 3 minutes, until mushrooms soften. Add thyme and cook 1 minute, until fragrant. Stir in chicken. Add wine and simmer 1 minute. In a small bowl, whisk together broth, cornstarch and Worcestershire sauce. Add mixture to pan and bring to a simmer. Simmer 2 minutes, until mixture thickens. Stir in cooked noodles and toss to combine. Season to taste with salt and black pepper.
Transfer to a serving platter and top with chives.