Agreements with foreign governments to investigate suspected killings abroad should be used to eradicate honour-based violence, campaigners have told MPs.

Legal agreements governing the detection, investigation and prosecution of “honour killings” committed abroad could pave the way for families of UK victims to achieve justice and send a strong message to the perpetrators that they would be vigorously pursued, a report said yesterday.

The report from the law school at Manchester Metropolitan University recommended that “caste” be specifically introduced to the concept of race under civil and criminal law and hate crime legislation, pointing to the link between caste and honour-based violence and forced marriages.

“No one should suffer violence or abuse because they belong to a different race or caste,” the report’s authors said.