UK Landlord Forum / Life

I have a situation here and would need advice.

1) I had problem with my tenant and to cut a long story short, I am in the process of getting a bailiff to have her move out of my flat.
2) The bailiff is expecting me to have keys to my flat. Sadly I may have lost the key.
3) Is there anyway to go about this without keys to my flat ? Example having a locksmith to be there ? Any suggestion / advice will help.

3. Get a locksmith, there's a high chance the locks may have been changed anyway.