The existence of “Sharia patrols” on London streets is well-documented in videos. White native Londoners are accosted, harassed, and attacked by roving gangs of militant Mohammeds in their strongholds if said kuffar drink alcohol or dress immodestly etc in such areas.
Anyone who is alert and diligent about these topics on the web knows about areas of Paris, London, and even Swedish cities where Muslims completely push out the native police and attack them relentlessly on occasion.
You are correct !
Also, British authorities have allowed Muslims to set up and operate separate Sharia courts and systems of administration of Sharia government for themselves in Muslim areas.