Youtube Video – “DeepStore provides expert commercial document storage and retrieval services and is the UK’s largest underground storage company. Based in Winsford, Cheshire, 150m below ground, the company was established in 1998 as an alternative use for the space created from mining millions of tonnes of rock salt in Britain’s largest salt mine – owned and operated by our parent company, Compass Minerals…In 1998, DeepStore was established to take advantage of this unique storage space. Treasured paintings, historical records and architectural models are among the items stored in the Winsford location. One of the more well-known DeepStore customers is The National Archives, for whom DeepStore manages public records…”