The UK immigration office displays zero tolerance for its own mistakes: "Application rejected because we lost your passport."

The most elementary sense of justice says that you must not hold your own mistakes against someone that is at your mercy. The people who work in that office have been taught to disregard the most elementary sense of justice; the culture of that office is "say no at any excuse".

I suggest moving those bureaucrats to the department that provides environmental approvals for construction and agriculture, and rebooting the immigration office with entirely new staff.