Hi
I need to replace a Yale lock in my patio doors but I do not have the
key.

The dorr is currently locked.

I have reoved the lock surrounds in the hope there would be a lock
number which would enable me to order anew key but I can't see a number
..

Is it possable to get a new key without having the old one?

How do I replace the lock without having the original key?????

Cheers