People will be able to go to police and ask if their partner has a history of abuse under a new disclosure scheme - receiving a response within 24 hours in the most serious cases.
If people are concerned about their safety they can now approach police either in person or by phone and ask about their partner's history.
Police will consider disclosing information on a case-by-case basis if it is legal and will protect the potential victim.
If there is a serious threat to the safety of a person or their children then a decision will be made within 24 hours, with other decisions coming within 20 working days.
A third party, such as a parent or friend, can make an application but they would not necessarily receive the information about the individual concerned.