After his brother retired from the antique dealership in 1935, Amyas and his wife Mary took over the business. They renamed the business Phillips of Hitchin, the name which it continued to operate under until its closure in 2014, when Amyas' son Jerome retired. Phillips of Hitchin has sold antiques to many well-known collectors, including Irwin Untermyer and Henry Ford II, and many museums like The Metropolitan Museum of Art, The Victoria & Albert Museum, The National Gallery of Victoria and Temple Newsam House.
