The window dates are not linked to application cancellations. For example, the applications can still be pending although the window has closed a week ago, or instantly approved although the window is still open. An employee can cancel their Cycle to Work order within 14 days of receiving their Letter of Collection (providing it hasn't been spent). For more information on refunds, please see the Cycle to Work refund process.
Cycle to Work+ - FAQ - What Happens if an Employee Wants to Cancel Prior to the Close Date of an Application Window? (for UK only)
