Very few people seem to accept the fact that the EU is controlled by the City of London (in partnership with a few other dynasties), as is much of the Western world. Their employees and activists are in control of Parliament and the Civil Service. Parliament is located in the City of Westminster, and once you realise this, you can understand that the whole Brexit process was an orchestrated plan.
What most people consider to be London is in fact a county ( Greater London) with a Mayor, and the City of London is an independent state that has retained its separate identity since the time of William the Conqueror. It has it own Lord Mayor, police force and laws. It is ruled by Almoners and Livery Companies, and the Queen needs to be met at the gates and escorted by an Almoner if she wants to make an official visit. It has its own representative in Westminster, who is known as the Rememberancer, and he is not elected, but is appointed by the City of London. England has a very old and complex political structure, and most people are not aware of the powers that it has. For example the Queen is able to enact certain statutes in the US. She gained these rights as a result of defaults on debts owed by both aides in the Civil War.
Even though some of this is slightly true (i.e. City of London is somewhat politicially autonomus), it's not relelvant to your point.
British military, spying and corporate power has an undue influence on the world, but it has nothing to do with arcane legal powers which may or may not exist (and are difficult to research).
Y'know how British spys, military and corporations really exert control over people? Lies and bullying. The whole point is that they don't care about rules or morals, and so citing weird laws as the basis for hegemonic acts makes precisely zero sense
It's very simple, and not quite as weird and spooky as your explanation, which only makes you and people like you look like weirdos that can be safely ignored. If you really care about balance of power issues, try to sound a little less like David Icke