Hi there. Unfortunately 27.5 isn’t clear on % allocations based on access. We have always encouraged Fair and open communication between the parties.
What type of business is it? Office, retail or industrial?
There are also other opportunities for you to drive value out of the asset. You could get them to exercise their right of renewal, or lengthen their lease as a way to recoup some of the lost value from not paying rent.
Happy to help out with more specific details if we can. email@example.com
All the best.