> Is that real time?

The clips shown on the Beeb (and Sky News) didn't look like time-lapse to me. I haven't seen the earlier bits of the footage, but apparently it suggests there was a ship-wide power failure. I did see a burst of diesel-like smoke a few seconds before the impact, and a bigger one immediately after.

Comments here include that the bridge was built in the 1970s, but that the building regs about using disaster-deflecting concrete posts ("dolphins") weren't put in place until the 1980s, after a similar prang elsewhere.