Amnesty's research focused on firms not directly related to the World Cup.

Qatari authorities passed new laws to improve workers' rights after signing an agreement with the United Nations' International Labour Organisation in November 2017...

However, Amnesty's latest report states that several hundred migrant workers employed by three construction and cleaning companies were forced to return home without being paid.

Responding to Amnesty's report, world football's governing body Fifa say they take "World Cup workers' rights very seriously" and in line with its human rights policy.