Mortice locks are found on wood doors in houses and metal doors in commercial properties.
Check the side plate on the open edge of your door to see if it bears the BS 3621 lock standard.
The kitemark and BS3621 stamp mark as well as stating it is 5 lever should be clearly visible.
The BS 3621 standard is recognised as giving the maximum protection for home and commercial use, approved by insurance companies and the police.
A mortice lock that simply states “5 levers” on the side plate and does not display the BS 3621 stamp mark still does not meet insurance and police recommendations.