Exclusive: two dossiers of material seen by the security council raise questions over export of British arms to the UAE, which has been accused of supplying weapons to paramilitary RSF group.

British military equipment has been found on battlefields in Sudan, used by the Rapid Support Forces (RSF), a paramilitary group accused of genocide, according to documents seen by the UN security council.

UK-manufactured small-arms target systems and British-made engines for armoured personnel carriers have been recovered from combat sites in a conflict that has now caused the world’s biggest humanitarian catastrophe.

The findings have again prompted scrutiny over Britain’s export of arms to the United Arab Emirates (UAE), which has been repeatedly accused of supplying weapons to the paramilitary RSF in Sudan.

They also raise questions for the UK government and its potential role in fuelling the conflict.

Months after the UN security council first received material alleging that the UAE may have supplied British-made items to the RSF, new data indicates that the British government went on to approve further exports to the Gulf state for military equipment of the same type.

British engines made specifically for a type of UAE-manufactured armoured personnel carrier also appear to have been exported to the Emirates, despite evidence that the vehicles had been used in Libya and Yemen in defiance of UN arms embargos.

The UAE has repeatedly denied allegations it gives military support to the RSF.

The full Guardian report