where is yarm
About Yarm. Situated in the heart of the Tees valley, the picturesque town of Yarm has a long and interesting history. It was also highlighted on BBC Breakfast television on Friday 19 January 2007 as being the best high street in England.uring medieval times, Yarm was one of the most important ports on the River Tees, and became home to shipbuilders, rope makers, clockmakers and tanners. In 1207 King John granted a royal charter for a weekly market and twice yearly. fair.