 According to Dr. Cyril Boucher of the Newcomen Society, this Newcomen Memorial Engine dates from about 1725, with new valve gear and other parts added later.Perhaps the last Newcomen-style engine to be used commercially – and the last still remaining on its original site – is at the Elsecar Heritage Centre, near Barnsley in South Yorkshire.It was restored to working condition between 2012 and 2015, the refurbished engine was unveiled by Prince Edward, Earl of Wessex, in May 2016.