Noises Under the Bridge!

Started the day with a morning of 'Child Protection Training' done online-just needed to be completed, so that's ticked off my to do list.
Then in the afternoon we had an Edinburgh Canal presentation with 7 people  coming to the flat to enjoy 'S' talk.  It was very informative and  well researched,  a lot of questions were asked, tea drunk and scones consumed.
Later on I went to my running club, there seems to be no correlation between being a good cyclist and being able to run well-that's a shame.
Even later went walking with 'M', there are some strange sound installations under two of the canal bridges, they gurgle and make watery noises, but I don't quite get it.