Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Q: Last time I visited the UK, 
it took 3 hours to get through the immigration queues.

I recall seeing signs saying something like:


  "Registered Travellers from [list of countries] can use the EU/UK lines."


I have another trip the the UK in a few months,
and I am really dreading the giant queue, especially after a 17 hour flight.

So I am looking up how to become a Registered Traveller.

It says:



Apply online for Registered Traveller membership. ...
You'll get a decision on your application within 10 working days. ...
If your application is accepted, the next time you travel to the UK you must go through the 'other passports' lane and fill in a landing card.
The immigration officer will check that you meet the criteria and tell you if you can become a member. ...



So does this mean that being accepted at point 2, isn't a real acceptance.
You get the real acceptance the first time you enter after applying, using the 'other passports' lane (i.e. the non-UK/EU line).
And then after that if you visit the UK again (assuming all successful), you get to use the EU/UK lane?

(I mostly just want to know if I am understanding it right. I think other things mean it just isn't financially worth it to me to become a registered traveller. I'ld need to pay for a Visa since I've not visited 4 times before)


A: Is it possible to use UK/EU lanes as a Registered Traveller the first time you enter the UK after applying?
****
Q: As seen in the Politics SE:


  Right now, you can jump on a ferry in France, head over to Cork, drive up to Belfast and catch the ferry to Liverpool, without ever showing your passport to anyone. It seems inconceivable that this arrangement could be maintained if and when the UK leaves the EU. 


Best I'm aware you'd need to show your passport before boarding in France, in much the same way that you do when taking the Eurostar to London. Because Ireland, like the UK, isn't part of the Schengen zone.

Which is it?

Bonus question: would you also need to show your passport to go from Belfast to Liverpool, or is that second assertion factual?


A: Do you need a passport to take the ferry from France to Ireland?
****
Q: My friend and I arrive to the HK airport (by international flights) with a 40-minute difference. Where is the best place for us to meet? I've heard that all flights arrive to terminal 1. Is it a good idea to meet at some specific place in Terminal 1, before going through the immigration and customs? If so, where exactly? (The map says there are 8 levels, and I'm not sure which level and place is most optimal.)


A:
Where to meet a travel partner at the Hong Kong airport?
****
