Yeah, it's a confirmed terrorist attack.
Was watching BBC news tonight and the story is that a B&Q truck drove down london bridge swerving in the shape of an "S" hitting 20 people mowing them down, after doing so, 3 men jumped out the back of the van from the rear doors wearing metal canisters strapped to their chests and shouting religious terms (presumably to attempt to excuse their actions or condone them) and made off down into the market with knives/blades lengthened at what was said to be about 12 inches, the suspects who drove the van have not yet been identified but 2 of the 3 men were gunned down, another 3 men are stilled believed to be on the run. The men who did this were sick minded and obviously thought that this was the right path, clearly it isn't.
Sadly, an innocent bystander was believed to have been shot in the head in a crossfire.
Video below: Civilians fled into a bar near the attack when officers stormed the bar.
UPDATE: 5 explosions have gone off in the market, it has not been confirmed if it was the terrorists or the police using a controlled explosion
I think the scariest part is, you can just be doing your daily routine and still have your life taken from you in an instant, just for being in the wrong place at the wrong time.
Really I would have expected more officers from SCO-19 to be positioned in London after the Westminster attack...