Draft 2 is out for comment - closes on the 6 December.
Water supply requirements appear to have disappeared, apart from a comment in 2.7.1 (l) which requires “Notification where water supplies may be drawn to supply the hydrant system”.
There is no ability to exclude a hydrant system from the fire safety design, and the draft still tries to control the layout of large industrial buildings.
As FENZ are overall in control of the hydrant design, which is right and proper as they are the end users, they should be the sole HSC. If they wish to contract out the vast majority of the hydrant system approvals, then that is up to FENZ, but FENZ need to take responsibility for their input to the design process.