Part one of the Dublin Walking Tour.

The audio is 90 minutes, so I'd say 90 minutes minimum, more if you stop along the way.

https://www.ricksteves.com/watch-read-listen/audio/audio-tours/london

Thanks for your help

We just completed it a couple of days ago and it took us about 2.5 hours pausing and checking things out along the walking tour.

Thanks, very helpful for planning our day.