Terry Burdett says:

“… I have been trying to identify a canal with a small town and a waterside park somewhere in the Midlands but to no avail. We were on a journey (driving) from Shugborough Hall to Cambridge and we stopped there for a picnic lunch. Could I possibly send you a rough map, drawn from memory to see if you could help? We enjoyed the time there so much and would like to return.”

Handily, he provides a sketch map:

Where is this? Click for a bigger version

Does anyone have any ideas about it?