You may find that it may have served anywhere in the country, but went to Telford as there was an Army Base Repair Organisation at Donnington. It is (or was) standard practice to send similar equipments to one base for repair and overhaul. Armour to Ludgershall, aircraft to St. Athan, and so on. Telford is now run by Babcock as a contractor to the Defence Support Group. Of course someone may be able to help you more with your question.