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

[EX Q]: 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.

[EX A]: How to use purchased train tickets for London Heathrow Underground to Norwich

[EX Q]: I'm flying United from Melb to Mexico City, with a transfer at LAX. MEL=>LAX UA99, LAX=>MEX UA1077.

These were booked on "one ticket" (I believe I'm using the term correctly?), I paid United once and have a single itinerary describing all the flights.

I am now learning that the transfer time for these flight is perhaps tighter than I should have booked (1h45m). I have never travelled internationally before and just picked the one with the shortest layover.

According to step 5 here[1] I don't have to pass through customs, though I'd hardly say its a reliable resource.

This map seems to show UA exclusively limited to terminal 7/8 and apparently there is an "airside" inter-terminal connection between 6,7 and 8.

So I'm figuring that if UA99 lands at 7/8 and UA1077 departs from 7/8, then I can get off one plane, walk to the gate and get on the next, without any customs or immigration? I'm also carry-on only, so no bags to drop/collect/etc.

Is it reasonable to think that?

Relatedly, if I was to miss my connection due to immigration, delays, etc, would United rebook me to the next available since I booked "one ticket"?


wikihow com Switch-Flights-in-LAX (sorry, can't post more than one link..., add a dot and a slash...)


[EX A]: LAX transit between flights without transfer between terminals

[EX Q]: When taking shared ride vans in the United States are you expected to tip? If so, how much?

To be clear I'm talking about services where you are lumped along with 5-6 strangers in a van that then takes each passenger to their destination from the airport (or vica versa).

It's not quite a taxi (where I would tip) and it's not quite a bus (where I wouldn't tip), but occupies some sort of middle ground between the two.

[EX A]:
Tipping in shared ride vans