Can the Employer terminate if an event occurs which stops the Contractor completing the works?

Can the Employer terminate if an event occurs which stops the Contractor completing the works?

The Employer may terminate if an event occurs which stops the Contractor completing the works if:

	Neither Party could prevent it the event and

	An experienced Contractor would have judged at the Contract Date to have such a small chance of occurring that it would have been unreasonable of him to have allowed for it (see Clause 91.7 R21).