圣殿骑士组织不列颠分册（British Rite of the Templar Order）是圣殿骑士组织内一个自治派系。
With the journal in his hand, Birch began scouring the globe, investigating several leads to the Precursor artifacts and sites. In 1738, Birch inducted Lawrence Washington into the Templar Order; Washington later rose in the ranks and became a Master Templar. Reginald tasked Washington with locating the precursor sites, but to no avail. Unimpressed with his progress, along with the newly established Colonial Brotherhood, Reginald sent another of his agents, Colonel George Monro, to further their efforts.
In 1750, Monro recruited Christopher Gist, a frontiersman who was tasked with exploring the west colonies, as well as strengthening the Templars' relations with the indigenous tribes in order to secure alliances and commercial lanes. At some point, Gist encountered a young thief named Jack Weeks who attempted to pickpocket the explorer. Despite Weeks being caught in the act, Gist was impressed by his skill and audacious attitude, and took him on as an errand boy; Gist later began tutoring him upon the suggestion of Monro. A year later, Gist and Jack were inducted into the Templar Order.
The same year, Washington learned that François Mackandal, Mentor of the Haitian Brotherhood, had obtained two powerful Precursor artifacts, the Precursor box and the Voynich manuscript, which aided the Brotherhood in locating several Precursor sites, with one located in Port-au-Prince. Lawrence traveled to Haiti and tracked down Vendredi, one of Mackadnal's students who had indirectly triggered a massive earthquake.
When Vendredi attempted to escape the site, his legs were caught near a crevasse under falling debris. Washington promised to aid him if he in turn revealed Mackandal's location. Vendredi reluctantly agreed, but Lawrence then slit his throat. Washington then traveled to Mackandal's camp and managed to steal the Precursor box and manuscript. Traveling by sea, he was pursued by Adéwalé. However, Washington was able to evade him upon reaching New York.
In the years leading up to the French Revolution, the British Templars became worried about the political and societal turmoil growing in France and by the rising power of the reformist faction in the Order of their French counterparts. As such, the Carrolls, a high ranking family of the British Order, took it upon themselves to eliminate the wife of the traditionalist Grand Master François de la Serre. De la Serre's wife had the ear of her husband and, although moderate, was herself a reformist.
While the Carrolls' attempt on Julie's life failed, their assassin left a clue of their involvement, which prompted Élise de la Serre to travel to London, years after her mother's death of consumption. During her trip, the Carrolls discovered that Élise, as the future French Grand Master, wasn't herself a staunch supporter of the monarchy and of the old Templar ways, and so tried to kill her. However, their daughter, May, was killed instead and Élise fled with the help of her childhood sword master, the British Templar Frederick Weatherall.
At the eve of the French Revolution, the British fears came true when François was killed by the reformist Templars loyal to François-Thomas Germain, who became the new Grand Master of the French Templars. Later, as Élise tried to claim back her birth right and avenge her father, the feud between her and the Carrolls prevented her from counting on any help coming from the British Templars, who had been turned against her by the vengeful parents.
By the 1860s, under the leadership of Grand Master Crawford Starrick, the British Rite had brought under their control almost all forms of governance within the city of London. The political, medicinal and scientific fields being guided by the Earl of Cardigan, Dr. John Elliotson, and Dr. David Brewster, respectively. The city's economic infrastructure, comprising the transport network, the factories, and the financial institutions, fell under the sway of Pearl Attaway, Rupert Ferris and Philip Twopenny, the Governor of the Bank of England.
Moreover, by paying off criminals to form their own gang, the Blighters, and installing their own as their leaders, under the supervision of Maxwell Roth, the Templars had also taken almost complete control of London streets and boroughs, and operated a monopoly on organized crime in the city.
Despite, or perhaps thanks, to this control, the British Rite during this time worked to maintain order in the city, albeit under their guidance. Following the near-total collapse of the British currency after Philip Twopenny's death, Crawford Starrick increased the wages paid to his workers in order to stave off the affects of inflation, and maintain his grip on the workforce.