It was built as an arm of the Grand Junction Canal , in two separate phases , opening in 1800 and 1801 .
The Buckingham Arm once ran from Cosgrove , Northamptonshire to Buckingham .
Buckingham Arm was built as an arm of the Grand Junction Canal , in two separate phases , opening in 1800 and 1801 .
The Buckingham Arm once ran from Cosgrove , Northamptonshire to Buckingham .