London-based consultancy firm Impactt has been brought in as an independent third party to ensure WW Standards - a set of enforceable regulations that are incorporated into all contracts for the 2022 World Cup - are being adhered to.

The second edition of the WW Standards were released at the beginning of last month, according to the Committee.

They detail the requirements regarding the recruitment, employment, living and working conditions of everyone connected to the construction and delivery of the World Cup stadia.

It follows the release of the Amnesty report on March 31, which alleged migrant workers building the Khalifa International Stadium in Doha for the tournament in six years’ time are continuing to suffer systematic abuses and in some cases forced labour.

The report also claims that workers are being forced to live in squalid and cramped accommodation and being required to pay large fees - $500 (£347/€442) to $4,300 (£3,000/€3,800) - to recruiters in their home country to obtain a job in Qatar.

The workers interviewed by Amnesty complained of being deceived as to the pay or type of work on offer, as well as not being paid for several months, employers not giving or renewing residence permits, firms confiscating workers' passports and not issuing exit permits, and being threatened for complaining about their conditions.

Malaysian construction company Eversendai has dismissed accusations that they are holding on to workers' passports and insist it had returned them to all of recruits last year.

They claim they gave the passports back in a bid to meet WW standards.

"Developed by the Workers’ Welfare Unit in close consultation with stakeholders including contractors, FIFA and NGOs, the new requirements update the original WW Standards, which were published in February 2014,” the Supreme Committee for Delivery and Legacy said.

"These revised standards are now in the process of being further embedded throughout the supply chain in a series of workshops with contractors and sub-contractors.”

In December of last year, Amnesty International accused Qatar 2022 and FIFA of doing too little to address "rampant migrant labour abuse".

It came after the publication of high death toll figures among migrant workers, with it claimed as many as 1,200 may have died since 2010.

It is estimated the number of people working on World Cup sites is set to surge almost 10-fold to around 36,000 in the next two years.