The RFU have since released a statement saying: "The RFU fully support Tom Curry in raising the racially abusive behaviour he experienced whilst playing for England against South Africa.
"During the match between England and South Africa on Saturday 21st October 2023, Tom Curry reported to the referee that he had been racially abused by Mbongeni (Bongi) Mbonambi.
"The subsequent World Rugby investigation were informed by Tom Curry that he had also been the victim of the same abuse, from the same player, in the autumn Test 2022.
"World Rugby have today announced their decision not to bring charges in respect of either incident.
"The RFU are deeply disappointed by the decision taken by World Rugby.
"The decision not to put the evidence before an Independent Disciplinary Panel has denied the disciplinary process the opportunity to hear Tom Curry’s voice and to independently assess his account of these serious events, together with the other available evidence.
"In their continued full support of Tom, the RFU together with the England squad, condemn the disgusting abuse he and his family has received on social media as a result of his having had the courage to put unacceptable behaviour that has no place in society or on the rugby field, in the public eye.
"Abuse of any kind is not acceptable and goes against the core values of rugby.