It’s the only manhole on this side of the house
There in another one on the back (opposite side of the hose) that I haven’t checked
The house is a mid terrace
Impossible to tell from the pic, would need a lot more info, and/or be on site to tell, but as the Water Co have taken responsibility, and your Mid Terrace, it is a fair bet the drain is shared.
As Andy has said above, that still looks blocked. There shouldn't be any sewage hanging about in the channel.
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