The British Transport Police (BTP) is rolling out more than 2,800 body cameras across its force.
After a successful 12-month trial, officers across England, Scotland and Wales will have body cameras.
Members of the BTP, PCSOs and officers ranked up to inspector will now have cameras fitted to their uniform.
The cameras will be clearly visible and members of the public will be told when they are being filmed.
The cameras will not be permanently recording but any footage that is recorded is automatically uploaded to secure servers.
BTP assistant chief constable Paul Brogden said: “A trial of body worn videos over the last year showed that they helped bring about speedier justice for victims.
“Not only do they provide vital evidence in cases, but they also can protect officers against malicious complaints and reassure the public as they travel through stations and on trains.”
The recordings can used as evidence in court or other proceedings.
Footage is deleted after 31 days if it is not flagged as evidence or used for policing purposes.
The cameras have started to be rolled out across the force and every officers should have one by March 2018.
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