EdLoach
Wikipedia agrees https://en.wikipedia.org/wiki/Brantham_TMD and the alternative location they mention I don't think has had any work done (as per wikipedia article), and I suspect this latest announcement (and work for this is underway) means they are expanding Clacton depot instead. https://www.greateranglia.co.uk/about-us/news-desk/news-articles/greater-anglia-deliver-transformational-£17m-wheel-lathe-facility