Below are excerpts from the 'Jason Bishop' profile at the former Undercover Research Group wiki, last updated in 2018.
Jason Bishop's presence was first noted in 1999 by activists at a land occupation to celebrate the 350th anniversary of early-English communists The Diggers, at St. George's Hill, Surrey. However, the Undercover Policing Inquiry (UCPI) dates his deployment starting in 1998. Again, while activists recall him leaving London in 2004/5, the Undercover Policing Inquiry states that his deployment ends in 2006.
He appears, like his National Public Intelligence Order Unit (NPIOU) successor, Mark Kennedy (aka 'Mark Stone') to have got himself involved himself in as many key anarchist campaigns and groups as possible (within London) at the time of his deployment (1999-2005). For instance, Bishop was involved with RTS, Disarm DSEi, Earth First!, Anti-GM activities and latterly the G8 mobilisation in 2005. In 'Undercover' by Rob Evans and Paul Lewis, Bishop's deployment is referred to as ‘uneventful’, while in 2018, Sir John Mitting, the chair of the UCPI, said that Bishop’s deployment was ‘unremarkable’ there is subtantial evidence which contradicts this.