This will depend on the day and time you send your form.
If you sent your form before 5pm (Monday to Friday):
You can expect your number to be moved the next working day.
If you sent your form after 5pm or over the weekend:
You can expect your number to be moved within two working days.
For example, if you submit it on a Saturday, your number will move across on the Tuesday.
Please note: Bank Holidays are not working days so your request may take longer to complete.