Just as a bit of a follow up Ive got round to finishing this job. Building inspector was happy without an AAV and theres no problems with the trap being drawn.
A few pictures (everyone likes pictures ):
Before:
After:
Rear plumbing:
Bought a geberit furniture WC frame which I turned the cistern round on for rear access (depite technical department saying they had nothing that did that! ) as I put a hatchway through the wall behind toilet so I didnt loose useful storage space. It also had a seperate flush button I could fit to the side so an open loo seat doesn't obscure it.
Thanks for the input.
A few pictures (everyone likes pictures ):
Before:
After:
Rear plumbing:
Bought a geberit furniture WC frame which I turned the cistern round on for rear access (depite technical department saying they had nothing that did that! ) as I put a hatchway through the wall behind toilet so I didnt loose useful storage space. It also had a seperate flush button I could fit to the side so an open loo seat doesn't obscure it.
Thanks for the input.