cant find the main pipe! would it follow the clay soil pipe

[scrambler]

dug down on the border of my property - right next to the Stop cock on the public pavement.

stop cock was about 30 -40 cm away - and looking down I can see the blue MDPE pipe going out the circular hole straight towards my place it seemed

But not there! halfway down to the depth I found a yellow gas pipe - and just a bit below..

I found a brick saying electricty at just below the depth.

I also found at about half depth od the edge of the hole a clay sewer pipe..

Actually would the pipe follow this clay sewer pipe?

 

[PrenticeBoyofDerry]

Mains water and sewer pipes do not need to run together, so likely not.
Does the external stop tap serve your property only?
Do you know where the internal stop tap is, can you work backwards?