Revolver is a small sewer overflow where the designers went a bit silly and added an access tunnel (which is gated and locked) two access shafts to the river below and the overflow chamber which has quite a few outfalls to the river.
Access is still by no means easy as both the infall and outfall to the river have grates and to get to the overflow chamber you can climb up to the walkway or duck under which is about a foot above the water and swim for it
The river of turds looked quite low but the waterline on the brick would have been waist deep any way on with the pics
The overflow chamber complete with lady plasters and crap
The outfalls to the river