a fire alert in Holborn. I say allegedly because I heard a completely different excuse being given over the tannoys and Tube staff are not renowned for telling the truth at the best of times - ever wondered why the minutes seem to last longer than 60 seconds on the 'next train' signs? It's so they don't have to pay compensation under the Customer Charter which entitles you to a refund if the train is more than 15 minutes delayed.
Speaking of which, if you were caught up in today's chaos you can claim a refund by clicking here. You might then recover some of that extra cash that Boris has just pinched from your pocket with his fare hike.