I flew from Jersey (the island, not the US state) to London Heathrow the other day, and because the flight had been delayed by an hour or so, the flight attendant read out details of what was going to happen with people's connecting flights (which ones they'd been rebooked onto, and so on). One of the flights they read out was for people who had connections straight back to Jersey.
I could understand getting a flight back fairly quickly - maybe you're going over to pick up a child and bring them back to Jersey with you or something - but surely in that case you'd want to go all the way through to departures to get them, and would therefore book two separate flights rather than having a direct connection.
What reasons might someone have to get a connection directly back to where they just came from?