My off-peak car (OPC) needs to be towed to the workshop. Do I need to purchase an e-Day Licence solely for this purpose?

When an OPC is on tow, an e-Day Licence is not required. However, if the OPC had been driven during the restricted hours on public roads prior to the breakdown or after the OPC has been fixed, then a valid e-Day Licence is required for the car for the day of use.