A group of black Labour MPs signed a letter to Sir Keir Starmer saying they were “losing faith in the ability and commitment of this leadership” to address issues raised in a critical report on the party’s culture.

The letter, seen by Channel 4 News, demanded “urgent action” to implement the recommendations of the report by Martin Forde KC.

The 2022 report detailed the toxic culture of factional disputes between the party’s right and left under Jeremy Corbyn.

The report identified concerns that attention to cases of antisemitism and the importance they played in the “interfactional conflict” had led to the party “in effect operating a hierarchy of racism” with other forms of discrimination being ignored.

Labour insisted it is fully committed to tackling racist and discriminatory attitudes in all sections of the party.

But in the letter obtained by Channel 4 News, the unnamed MPs said: “Despite our party’s claims to be anti-racist … we, our members and supporters are losing faith in the ability and commitment of this leadership to tackle the issues raised in the Forde report, and we demand urgent action.”

The Labour Party is fully committed to tackling racist and discriminatory attitudes wherever they arise in whatever section of the party

Mr Forde told Channel 4 News there had been “slow progress” in implementing the recommendations of his report and he was keeping a “wary eye” on the situation.

A Labour spokesman said: “The Labour Party is fully committed to tackling racist and discriminatory attitudes wherever they arise in whatever section of the party.

“Labour has apologised for the culture and attitudes expressed by senior staff that were examined by the report.

“We have implemented the bulk of the recommendations within the report, including a number that were implemented before the report was published, and the delivery of further recommendations is under way.

“We have established one of the most robust complaints systems in the world to ensure that all complaints and disciplinary processes are dealt with fairly and impartially, and agreed and implemented codes of conduct on Islamophobia and on Afrophobia and anti-black racism which set out the minimum code of conduct expected by the party of all of its members.”

The party was funding a black leadership programme and new codes of conduct were due to be agreed by the national executive committee.

Mr Forde said: “There’s been slow progress. I mean, in fairness to the party, there were some changes made at the party conference before the report landed.

“Like all reports, it’s about implementation. So you can make recommendations. And if they’re not implemented, then, you know, the report was pointless so I’m keeping a kind of wary eye on what is and isn’t done.”