instruction:
Given a travel related situation, and given a specific question about the situation, summarize the question into a title
question:
At least in Vancouver Airport one has to spend a lot of time to get to the electronic customs declaration kiosks. This got me thinking - is it possible to fill out the paper based customs declaration (form E311) instead (saved up from a previous overland trip) instead of using the electronic version? One could then skip the first queue and directly stand in line for the immigration officers. 

If it matters, I'm a Canadian resident who is not a US/Canadian citizen.

answer:
Can you fill the printed customs form to save time in Canadian airports?


question:
I have been invited to a conference in USA. I am going to apply for a B1 visa. Unfortunately the invitation letter doesn't have a signature on it. Only the email id and the website is there. Would the letter be valid in this case?

answer:
Is a signature mandatory for a B1 visa invitation letter?


question:
I am travelling from London Heathrow Underground to Norwich, UK on the 18th of June 2017.  For this purpose, I purchased tickets via trainline.com and these were delivered to the USA  (perhaps it was a bad idea, but its done now!).



I am confused as to how to use these tickets/this ticket.  The folks at Trainline.com were unable to help me via telephone. I noticed that when I use Trainline's route service, this was returned:



So the ticket(s) I have:


Where do I use them? At London Heathrow underground or elsewhere?
Should I get other tickets for the tube journey between Heathrow underground to Liverpool street station?
Related: Where exactly is Heathrow underground with relation to terminal 2?


Please do let me know if I can improve this question in any fashion.

answer:

How to use purchased train tickets for London Heathrow Underground to Norwich