Question: Alan McCullough (July 1981 – 28 May 2003) was a leading Northern Irish loyalist and a member of the Ulster Defence Association (UDA), he served as the organisation's military commander for the West Belfast Brigade's notorious C Company which was then headed by Jonathan Adair, better known as Johnny Adair or Mad Dog Adair, is an Ulster loyalist and the former leader of the "C Company", 2nd Battalion Shankill Road, West Belfast Brigade of which organization?
Context: Donald Hodgen (born 25 May 1963) is a Northern Irish loyalist and a former member of the Ulster Defence Association (UDA).  He was best known as the commander and chief enforcer of West Belfast Brigade leader Johnny Adair's notorious C Company which operated on the Shankill Road. William "Bucky" McCullough (1949 – 16 October 1981) was a Northern Irish loyalist paramilitary with the Ulster Defence Association (UDA).  McCullough was a leading member of the UDA's West Belfast Brigade, holding the rank of Lieutenant-Colonel, until 1981 when he was killed by the republican Irish National Liberation Army (INLA). Jim Spence (born c. 1960) is a Northern Irish former loyalist activist.  Spence became notorious for his time in the Ulster Defence Association (UDA), serving two spells in charge of the West Belfast Brigade.  Spence is a native of the Woodvale area of Belfast's Shankill Road. H. David "Davy" Payne (c. 1949 – March 2003) was a senior Northern Irish loyalist and a high-ranking member of the Ulster Defence Association (UDA) during the Troubles, serving as brigadier of the North Belfast Brigade.  He was second-in-command of the Shankill Road brigade of the Ulster Freedom Fighters (UFF), which was the "cover name" of the militant branch of the UDA.  The group was responsible for a series of abductions and killings of mostly Catholic civilians in the early 1970s. Alan McCullough (July 1981 – 28 May 2003) was a leading Northern Irish loyalist and a member of the Ulster Defence Association (UDA).  He served as the organisation's military commander for the West Belfast Brigade's notorious C Company which was then headed by Johnny Adair. Jonathan Adair (born 27 October 1963), better known as Johnny Adair or Mad Dog Adair, is an Ulster loyalist and the former leader of the "C Company", 2nd Battalion Shankill Road, West Belfast Brigade of the Ulster Freedom Fighters (UFF).  This was a cover name used by the Ulster Defence Association (UDA), a loyalist paramilitary organisation.  In 2002 Adair was expelled from the organisation following a violent internal power struggle.  Since 2003, he, his family and a number of supporters have been forced to leave Northern Ireland by the mainstream UDA. Tommy "Tucker" Lyttle (c. 1939 – 18 October 1995), was a high-ranking Ulster loyalist during the period of religious-political conflict in Northern Ireland known as "the Troubles".  A member of the Ulster Defence Association (UDA) – the largest loyalist paramilitary organisation in Northern Ireland – he first held the rank of lieutenant colonel and later was made a brigadier.  He served as the UDA's spokesman as well as the leader of the organisation's West Belfast Brigade from 1975 until his arrest and imprisonment in 1990.  According to journalists Henry McDonald and Brian Rowan, and the Pat Finucane Centre, he became a Royal Ulster Constabulary (RUC) Special Branch informer. The UDA South Belfast Brigade is the section of the Ulster loyalist paramilitary group, the Ulster Defence Association (UDA), based in the southern quarter of Belfast, as well as in surrounding areas.  Initially a battalion, the South Belfast Brigade emerged from the local "defence associations" active in the city at the beginning of the Troubles.  It subsequently emerged as the largest of the UDA's six brigades and expanded to cover an area much wider than its initial South Belfast borders. John Albert Thompson (born 13 November 1963), commonly known as Fat Jackie, is a Belfast-born Northern Irish loyalist activist who was a senior member of the Ulster Defence Association (UDA).  Thompson was close to Johnny Adair during Adair's time as leader of the UDA West Belfast Brigade and remained one of the last of the "C Company" members to support Adair.  Thompson was briefly brigadier in West Belfast in 2003 between Adair's imprisonment and his fall. The UDA West Belfast Brigade is the section of the Ulster loyalist paramilitary group, the Ulster Defence Association (UDA), based in the western quarter of Belfast, in the Greater Shankill area.  Initially a battalion, the West Belfast Brigade emerged from the local "defence associations" active in the Shankill at the beginning of the Troubles and became the first section to be officially designated as a separate entity within the wider UDA structure.  During the 1970s and 1980s the West Belfast Brigade was involved in a series of killings as well as establishing a significant presence as an outlet for racketeering.
Answer: Ulster Freedom Fighters (UFF)