For various reasons, the new firm operated as a dual-listed company, whereby the merging companies maintained their legal existence, but operated as a single-unit partnership for business purposes. The terms of the merger gave 60 percent ownership of the new group to the Dutch arm and 40 percent to the British. National patriotic sensibilities would not permit a full-scale merger or takeover of either of the two companies. The Dutch company, Koninklijke Nederlandsche Petroleum Maatschappij, was in charge at The Hague of production and manufacture. A British company was formed, called the Anglo-Saxon Petroleum Company, based in London, to direct the transport and storage of the products.

Answer this question, if possible (if impossible, reply "unanswerable"): What city were both branches of the new firm located in?
unanswerable