Welcome to the FAQ website covering document topics in Canada.
I am a Canadian citizen. My mother was born in the UK, and so I applied for UK citizenship under the UKM. I received a letter that my citizenship will be granted, but I am waiting for the citizenship ceremony to be scheduled. Next I will want my UK passport. Can I apply for my UK passport right away, or do I need to wait for the citizenship ceremony first?
You need to wait until after your have completed the citizenship ceremony before you can apply for your UK passport.