If you need to get your British Standard 5-lever mortice lock opened, you can call the nearest locksmith to help you. This can either be picked open or drilled depending on the problem and the type of lock. These locks are usually opened within 15 – 20 minutes and can be replaced in about the same time again.
Locksmiths can charge around £95 to £140 for this service, and if it is an emergency or an out of hours call you can expect to pay more.