It may have changed but when the wife went in 05 she had to get their early and queue.
She went the night (as they stayed in a nearby hotel) before with her Tita po and spoke to the guard who was friendly and told them what they needed to do.
I think you have to make sure you go on a day when they are processing Brit applicants.
Im sure ladies who have been recently can give more up to date advice.
