Travel after citizenship ceremony

Hi all respected members I just need to ask next week I have Citizenship ceremony and as I been told on my approval email that I have to send my brp back after getting the certificate my question is if I travel straight after ceremony without british passport can I travel or not how does it work if I don't send my brp back and send it back when I got the british passport and secondly can I apply for passport before travel?

Kind Regards

as far as i know, you should send your BRP back which is no longer valid once you are a british Citizen, you need british passport to travel.

https://www.gov.uk/apply-citizenship-in ... ertificate