Drain Design for Remodel - Ground Floor WC & Kitchen on party wall side

[HaloThree]

Hi folks,

 

We're moving the downstairs toilet, kitchen and utility to the opposite side of the house. This is up against the party wall side of the house and further away from the existing drain.

 

Looking for a sanity check before I engage the BCO on the matter, I've taken a look at the Part H document and tried to make sense of it. See attached my proposed drainage plan - I would really value some input before I put it in front of the BCO.

 

Regards,