I just spoke with Russell on the phone, and he was incredibly helpful.
As per the drawings that I sent to Russell please can you let me know if this measurement is correct? They want to include the two stairwells in the rentable area which they say are 'exclusive use penetrations'. But these are our only way in and out of the building and we are only occupying space on the 2nd floor. There is nothing above us except the roof, and belos us is a retail outlet.
Please let me know if these elevations can be included in the rentable measurement.