<Tr> <Td>? - proposed </Td> <Td> <Table> <Tr> <Td> </Td> </Tr> </Table> </Td> <Td_colspan="2"> </Td> </Tr> <Table> <Tr> <Td> </Td> </Tr> </Table> <P> The Grand Union Canal in England is part of the British canal system . Its main line starts in London and ends in Birmingham, stretching for 137 miles (220 km) with 166 locks . It has arms to places including Leicester, Slough, Aylesbury, Wendover and Northampton . </P> <P> The Grand Union Canal was also the original name for part of what is now part of the Leicester Line of the modern Grand Union: this latter is now generally referred to as the Old Grand Union Canal to avoid ambiguity . </P>

Where does the grand union canal start and end