When I started campaigning to kick the military and defence sector off UK university campuses in 2017, little did I know that the organisation I would go on to co-found, Demilitarise Education, would discover these partnerships are worth over £1bn.

These are lucrative relationships, with money flowing between parties in the form of academic and research partnerships and investments. But £1bn is still far below the total we eventually expect to uncover.

What is the precise nature of these relationships, and how did the arms trade so closely enmesh itself in higher education?