Engine Failure

So, I'm walking along the South Bank of the Thames and see one of the Ducktour amphibious vehicles ahead of me. It wasn't going particularly qucikly, and I ended up overtaking it.

 

After a couple of minutes, I looked back to see that it had stopped, and a fireboat was heading towards it, followed by a lifeboat. By the time I retraced my steps to see what was going on, the fireboat had drawn level and was attaching a rope to it, while the lifeboat kept an eye on procedings from a little further away.

Done