John Burling supplied this month’s mystery ship, sending in two photos to test readers’ knowledge. He saw the ship moored in the river Tamar at Plymouth in the mid-1980s, and the dredger in mid-river was photographed in Portsmouth harbour in the 1960s. This is all the information he could supply, so can anyone help with any further details? Can any reader supply the names of the ships? When and where were they built? And were they regular visitors to the south coast ports where they are pictured?

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