No, you will receive your account details as soon as your online application has been approved.
Once you've successfully opened your account, you'll receive two emails: one containing your account number and sort code, and the other with details on how to set up and log in to your online money account, so you can start managing your finances. You can set up your online money account before your card arrives, and you will be able to receive money, but you'll need to wait for your card to begin spending or transferring money for security reasons.