Guest the house of Windsor have nothing to do with anything that MI5/6 or 600 does. This is an often spread lie, while the queen may sign bills or give the royal assent before a bill passes into law, she has nothing whatsoever to do with the framing of that law.
The Queen's speech read at the opening of parliament, is written by the government, and she has no input.
If you want to blame someone blame the government, or the PM thereof!
Giok