Oh dear, that's a bit of bad luck. I suppose one of the new trains was bound to break down at some point. No doubt there will be a bit of a fuss in the local media.
a bit of bad luck ? A train gets stuck for 5hrs with passengers on board without lighting,heating,toilets or even hot drinks as they ran out, that they eventually decide to use ladders to get passengers off with because the rescue train coupling was broke, and thats just a bit of bad luck...

and when was the last time a 90+mk3 set did that ? the only one I can remember involving passengers de-training was on Liverpool Street approaches when a bit of the new overground bridge theyd put in decided to prove Newtons law of gravity, this is 86s & summer of 95-96ish territory when the trains used to just give up in the middle of Essex somewhere for no reason and youd lose hours cooking as the aircon packed up, but at least you could use the toilet if you could fight your way past people to get to them.