The period of payment has elapsed with no payment from the Employer. The Defects liability period has six months to go. As the contractor has served a termination notice under reason R16 what are the obligations of the Contractor to the Employer for the remaining 6 months of the defects liability period
Termination does not mean that the contract ceases to exist for all purposes, any rights already accrued by the parties remain unless the termination provisions state otherwise. So in your scenario the Contractor will remain responsible for any Defects in completed work for the next 6 months.