over Alfred Booth and Company, which increased the scope for fleet transfers between subsidiaries. Not until 1952 did Lamport and Holt resume adding ships to its fleet newly built to its own specification. These were two motor ships, the Siddons and Raeburn, plus the steamship Romney, which became the company flagship. They were joined in 1953 by the motor ship Raphael, which had a top speed of . In 1953 the fleet was back up to 16 ships and had a combined tonnage of . A sister ship for Raphael, the Ronsard, was built in 1957. Lamport and Holt continued to buy second-hand ships. They included the refrigerated cargo motor ship Mosdale in 1954, which Lamport and Holt renamed Balzac and used almost entirely to ship bananas from Santos in Brazil to mainland Europe or for Geest from the island of Dominica to Britain. Its success led the company to have two new refrigerated ships built: the Constable in 1959 and Chatham in 1960. In 1967 Booth Line took over Lamport and Holt's services to New York, ending a trade in which Lamport and Holt had been engaged for more or less a century. In 1974 Vestey Group moved Lamport and Holt's head office from the Royal Liver Building to Albion House, Liverpool. By 1977 Lamport and Holt's fleet was reduced to four ships. Containerisation Modern intermodal containers for freight were developed in the 1950s and standardised by ISO standards from the end of the 1960s. They were rapidly transforming cargo shipping. Lamport and Holt's traditional break-bulk cargo ships were not equipped to carry containers, but the company believed that it would be some time before all ports in South America would be adapted to handle them. Since 1967 Austin & Pickersgill had been mass-producing a standardised motor ship, the SD14, in Sunderland on the River Wear. The SD14 was designed as a shelter deck break-bulk cargo ship to replace Liberty ships and Victory ships. Subsequently, A&P adapted the design to carry 118 20-foot containers on deck and on the hatch covers as well as break-bulk cargo in the holds. Accordingly, in the late 1970s Lamport and Holt ordered four SD14s of and from A&P. They were launched as Bronte. Browning and Boswell in 1979 and Belloc in 1980. They formed a new "B-class", and Lamport and Holt rapidly sold its existing fleet as they were delivered. Unlike previous Lamport