I'm moving on from campaigners deliberately trying to derail a debate, because they want to debate the person, not the argument (and yet refuse to debate the qualities of the people they reference).
The same people outraged at the Union Jack flying for the Jubilee, are those celebrating the flying of the Progress++ Pride Flag. Intersex people are canon-fodder in this debate. There's likely to be something else added next year (and anyone who mocks the constant additions to the flag is called a bigot).
I'm seeing a growing number of actual gay people getting fed up with it. The rainbow flag used to be an indicator that the establishment was gay themed (like a gay bar, gay book shop etc), now it is used by all businesses (who were rather quiet about the issue in the 70s, 80s, 90s and 00s).
The only reason the flags are up is because they think it is profitable and think more people will come into London to spend money because of the flags. Rainbow capitalism at its finest.