Elizabeth25, the 17 minute gap is so they have enough time to squeeze all the people onto the 17.53, take some off to give them mouth to mouth, push them back on again and wave that 4 carriage nightmare away with a sodden handkerchief. I'm guessing. But I hope I'm wrong.

Being 2 minutes earlier than the existing 17.55 means I'll probably miss it each day now too, as I have to rush to get that, meaning I miss an extra 11 minutes of my baby's waking life each working day - 4 hours per month, 2 whole days per year. I demand a refund! And a seat.