<Tr> <Th> Produced </Th> <Td> 1965--1979 </Td> </Tr> <Tr> <Th> Number built </Th> <Td> 20 (inc. 6 non-commercial aircraft) </Td> </Tr> <Tr> <Th> Program cost </Th> <Td> £ 1.3 billion </Td> </Tr> <Tr> <Th> Unit cost </Th> <Td> US $33.8 M (1972) £ 23 million in 1977 </Td> </Tr>

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