ELI5: Explain Like I'm 5

Early Doors

"Early doors" simply means doing something before the usual or expected time. It's like if you normally go to bed at 8pm, but one night you decide to go to bed at 7pm - that's "early doors" for you. It can be used for anything, like starting work early or going to a party before it officially starts. It's just a way of saying you're doing something earlier than you normally would.