The Knights Beneficent of the Holy City (KBHC) is the anglicised name of a very old and very "elite" masonic body known worldwide as "CBCS", short for "Chevaliers Bienfaisant de La Cite Sainte".
There are several "obediences" in this Order, which do not officially recognise each other, but in England particularly, Regular Membership of CBCS was traditionally restricted to literally just a handful of the most senior Knights Templar!
However, many English masons, quite legitimately, took the step of crossing the Channel to Belgium, where membership was more easily obtainable.
Recently, in only 2007, the Grand Priory of Belgium sanctioned England to work the Degrees of the Order, forming part of the Rectified Scottish Rite, more openly, but still in a quite restricted, "Invitation Only" manner.
The Grand Priory of England is governed by the Grand Master, who is supported by a Grand Prior, a Grand Chancery and a retinue of Grand Officers who are his advisers and assist in the administration of Grand Priory, a meeting of which is convened at least once in every year.