"The Increment"

The Secret Intelligence Service (SIS), better known as MI6) he apparently mentioned a cell comprised of operators from within 22 SAS and the Special Boat Squadron that was known as "The Increment"; they are/were the cream of the crop of SAS/SBS soldiers that are selected and sent specifically on SIS-supervised missions such as would have been the case in Tomlinson's accusation that SIS had devised possible assassination scenarios for Serbia's Slobodan Milosevic. It is not known if they are a permanent unit or whether they are only activated for specialist operations.

According to a 1998 letter drafted by former SIS agent Richard Tomlinson, Tomlinson claimed the existence of the unit oand of a written plan to use The Increment to assassinate Milosevic.:

"The remainder of the document proposed three methods to assassinate Milosevic. The first method was to train and equip a Serbian paramilitary opposition group to assassinate Milosevic in Serbia. Fishwick argued that this method would have the advantage of deniability, but the disadvantage that control of the operation would be low and the chances of success unpredictable. The second method was to use the Increment (a small cell of the SAS and SBS which is especially selected and trained to carry out operations exclusively for MI5/MI6) to infiltrate Serbia and attack Milosevic either with a bomb or sniper ambush. Fishwick argued that this would plan would be the most reliable, but would be undeniable if it went wrong. Fishwick’s third proposal was to kill Milosevic in a staged car crash, possibly during one of his visits to the ICFY (International Conference on the Former Yugoslavia) in Geneva, Switzerland. Fishwick even provided a suggestion about how this could be done, such as by disorientating Milosevic’s chauffeur using a blinding strobe light as the cavalcade passed through one of Geneva’s motorway tunnels."