Hi there I am doing a there and back from Samui to Singapore all in the same day. I will have approximately 5 hours in between flights. I am sure other people will have done this too. Obviously no luggage. Does anybody know if I have to exit arrivals and then check in again or can I just stay this side of immigration? I am asking as I am wanting to book the lounge, but it seems pointless if I have to exit and then wait until 2 hours before my flight before I can access it. Many thanks.