From Cowroast to Milton Keynes

I went by Bulbourne, the locks of Marsworth, and the Tring Reservoirs. The Tring Reservoirs are made up of four reservoirs built between 1800 and 1838 to supply water to the Grand Union Canal. These side ponds were built beside the Marsworth locks to save water. When the lock was emptied, half of the water was channelled into the side ponds to be used again next time the lock was filled. The water stores are no longer used, but are important for wildlife in the region.
My further way took me nearby the location where the Great Train Robbery took place. I went through Leighton Buzzard to a camp site near Milton Keynes.