Yes, you can watch it live during broadcast or on catch up the same evening. I think episodes normally appear around an hour after it's been aired but someone will come along to confirm.
@Sarah13324 If the previous 7 seasons are anything to go by, the episodes will first be broadcast at the same time as they are in the US, that is at around 2am. They will then be available on catchup, and a second “live” broadcast at 9pm the same day.
At least 2 other shows follow this pattern, Westworld and True Detective.