This is what we used to call (and I still do) a Thameslink train, until the idiotically and meaninglessly named First Capital Connect took over the franchise. I have rather a soft spot for these dual-voltage electric units, even though they have never been enormously reliable. They were produced by British Rail in the
This one is setting off from Bedford for Brighton. This clip captures what I love about these sets -- the distinctive whining noise they make when picking up speed, which reminds me very much of the old Southern Region electric units with slam doors that I remember finding so exciting when I first came to London as a schoolboy in 1957 (when they were all painted green).