Concerts end late. You know this. The O2 knows this. North Greenwich station knows this.
The station stays open for a good while after the main event. They’ll have staff herding you like cheerful, exhausted sheep. It’s annoyingly efficient.
O2 Arena London Map , The O2 London – HEFS
And yes, the trains run later on event nights. You won’t get stranded. Unless you decide to stay for three encores and a sad chat with a hot dog vendor. Then maybe.
One Tiny Warning
The platform at North Greenwich can get insanely busy after a big show. Like, sardine-can busy. You will be pressed against people you’ve never met. You will make awkward eye contact with a stranger’s armpit.
My advice? Hang back. Grab a drink from one of the O2’s bars. Wait ten minutes. The crowd thins out, and you’ll get a seat on the Tube like a civilized human.