In a word, no @Tony_h
Depending on how you pay your bill you might need to contact customer services once the bill is generated to pay as your access to your My o2 will be shut.
If you pay by direct debit though just wait and leave the DD in place.
Guide: Cancelling Your Contract
Guide: How to get your PAC [June 2021 Update]
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
