London Expeditionary Trips: 

Tyburn Stream - Monday 10th Feb 2014

There was no sign of anything other than a disconnected water spout...so we walked on down the hill, looking for manhole covers that might indicate where the stream flowed,.
                               All at once, there was a grill: in the middle of the road, at the top of the camber, so it couldn't be a drain...  mind you... there was traffic on both sides...
Nothing daunted, we examined the grill, and recorded the sound and sight of running water, deep below: [click here for mobile phone video]