and that picture of a crumpled bike was a bit of cheap shot, bikes get crushed by trucks all over London, often on the most innocuous bits of road
There is clustering of KSI cyclist accidents around Vauxhall Gyratory which indicates a specific design issue. It is always difficult to ascertain because, thankfully, cyclist KSI is a rare enough event to make random clustering of accidents possible. But the numbers at Vauxhall seem to point to something else problematic happening. I have ridden through the junction on occasion and it is doable for someone taking the lane assertively and riding quickly, but it certainly wasn't particularly pleasant which leads onto the general theme that subjective safety is important if we don't want to put up physical barriers to general cycling.
What I found disconcerting at Vauxhall was that there simply no wiggle room for error. You pick a lane and aggressively try to hold it, but the widths and number of lanes means that drivers can undertake and overtake at speed. Also, drivers are cutting in and out of lanes, and I was always concerned that a driver would swap lanes quickly and side swipe me. Nothing much you can do about that if the driver is staring at the sat-nav / street signs instead of the road. On a confusing and fast gyratory, I think this possibility becomes more likely than on a slower, more straightforward bit of road.