<Tr> <Td> Alec Douglas - Home </Td> <Td> 1963--1964 </Td> </Tr> <Tr> <Td> </Td> <Td> Harold Wilson </Td> <Td> </Td> <Td> Alec Douglas - Home </Td> <Td> 1964--1965 </Td> </Tr> <Tr> <Td> Edward Heath </Td> <Td> 1965--1970 </Td> </Tr> <Tr> <Td> </Td> <Td> Edward Heath </Td> <Td> </Td> <Td> Harold Wilson </Td> <Td> 1970--1974 </Td> </Tr>

Who sits behind the prime minister at pmqs