Yes - There are floorboards but I plan to access the ceiling void from below as the ceilings are being replaced.
The room to be accessed is at front of house and kitchen is at rear- separated by passageway
Not readily as its concrete floor. Chosen route is based on fact that ceilings are being replaced.
Yes passageway and all ground floor rooms are concrete floors.
Can I build some sort of bleed outlet at highest point. Are such items available from plumbing shops
Sorry was called away. No problem with taking floor boards up upstairs. I shall certainly further explore that option. Thanks for your advice