Good grief. I'm still unsure why there are flags flying at all given that they cost money and do nothing. I can see why they've cut them like that (I imagine they hang badly at that angle and wrap themselves up) though I wouldn't put them up rather than cut them. However I can't get worked up about a bit of cloth that very few look at up there.
And not sure if it is a gross insult to the country, the residents of Southwark and visitors to Southwark. I'd be more insulted by something far more material than a cut flag. Maybe blocking up all the roads at the same time with roadworks?