Defer a General Vesting Declaration Date

Having served the GVD and given the vesting date can the vesting date be deferred to allow a late undertaking form an owner to complete works and have the premises occupied to meet the purpose of the CPO? I havent been able to see anything that allows a defferral.

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CPOs

We have looked at this in Bradford as we sometimes find oursleves in this position. The owner can apply for a Judicial review of the deceison to confirm the CPO but other than that nothing seems to halt the GVD process once it has commenced.