Where does the grand union canal start and end?
No context provided
Where does the main part of the Grand Union Canal start and end?
Starts in London, ends in Birmingham
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Where are the start and end points of the arms of the grand union canal?
Leicester,  Slough, Aylesbury, Wendover, Northampton
Grand Union Canal
https://en.wikipedia.org/wiki/Grand%20Union%20Canal
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.[1] It has arms to places including Leicester, Slough, Aylesbury, Wendover and Northampton.
Grand Union Canal
The Grand Union Canal in England is part of the British canal system. The main line, or main part, of The Grand Union Canal, which starts in London, ends in Birmingham. The arms of the canal reach Leicester, Slough, Aylesbury, Wendover, Northampton.