We travelled down through the 16 locks on the 6 mile arm off the Grand Union Canal. The locks are all narrow so we went either in front or behind No Problem. The lock keeper had opened the paddles to let extra water through because the first pound was a bit low. The TESCO mooring provides a useful stop before the end but old boats and buildings did not encourage us to stay over night. Took 2 days to get to the bottom and were lucky to find space for our two boats. It was safe and secure among other boats in the basin. Thanks to The Aylesbury Canal Society who welcome visitors. All the water we used goes into a river so is a 'loss' to the Grand Union. When the arm was opened it halved the price of coal in Aylesbury back in 1814.