In 1993 the far right British National Party achieved a breakthrough in the East End of London when one of its members was elected as a councillor on the Isle of Dogs in Tower Hamlets. This was a period of racist murders, including the killing of Stephen Lawrence not far from the BNP HQ in Welling, SE London. The BNP still had a street presence in East London too, selling papers on Brick Lane.
It was also a period of mass opposition to the far right, one of the largest manifestations of this being the 'Unite Against Racism' demonstration called by the Trades Union Congress (TUC) on 19 March 1994. Around 50,000 people took part in the march through the East End, from Spitalfields to London Fields. This was part of a wider mobilisation that among other things led to the BNP losing their council seat in new elections in 1994.
As has been confirmed in the Undercover Policing Inquiry, anti-racist groups were infiltrated by undercover 'spycops' who dutifully reported on everything that moved. In July 2024, the Inquiry
published a series of reports seemingly written by Trevor Morris who had infiltrated the Socialist Workers Party and Anti-Nazi League using the name Bobby Lewis (HN78). This includes an assessment of the SWP/ANL's planning for the TUC march, in the context of which it is mentioned that David Bowie had recently made a donation of $1000 to the ANL. Thus we have the unusual billing at the end of the report where the list of 'Special Branch References' - usually referring to people/organisations of interest to Special Branch - is headed by David Bowie and followed by Anti Fascist Action, the Anti Nazi League, Newham Monitoring Project and several Turkish revolutionary organisations reported to be joining the TUC march.
During the 1970s of course Bowie's brief apparent flirtation with fascist imagery had been one of the instances that prompted the formation of Rock Against Racism, but his subsequent actions show that he decisively moved on from that time. Doubt if he had a Special Branch file (I believe that the letters n/t next to his name stand for 'no trace' in their records), but who knows?