The Association of Train Operating Companies (ATOC) is an incorporated association owned by its members. It was set up by the train operating companies, formed during privatisation of the railways under the Railways Act 1993.
As well as being the official voice of the passenger rail industry, it also provides its members with a range of services that enable them to comply with conditions laid on them in their franchise agreements and operating licences. These include the National Rail Enquiry Service (NRES) and Railcard marketing.
ATOC's principal activities include assisting members to co-operate on developing and managing projects that benefit passengers and to promote the advantages of the rail network.