My Daughter has just moved into her house and there is no key for one
of the mortice locks.

We want to change the lock, any ideas on how we can remove the old
lock (it is locked by the way)

I thought about cutting through the lock with an angle grinder but
will it be able to cut through the steel inserts in the latch?

Your help would be appreciated.

She can't afford a locksmith by the way.