What is a 2:30?

Often trains and other forms of transport (flights, buses) are referred to in short by the time that they departed. So in this case “he” took the train to Weybridge which departed at 2:30

A 2:30, or any other time with “the” in front of it refers to a train or bus. “He took the 2:30 (train) to Weybridge.”

I'm guessing some kind of public transportation, referring to the time that it leaves. like maybe a train that leaves at 2:30 pm. she's calling it "the 2:30" for short. can't be positive with no other context, but that's my guess.

It is the train departure time. When trains are regularly scheduled it is common to say “I took the (insert time) from/to (location)”

A train or bus that leaves at 2:30

I'd imagine it's an unspecified transportation. They used the time it arrived at the stop/airport/whatever to describe the vehicle. Like if there was a bus that arrives at 2:30, then this unspecified person took the 2:30, (bus) to Weybridge. Since it says to Weybridge context suggests it is transportation but time could be used to name anything. "Which pizza did he eat?"He ate the 5:00 one [the one that got delivered at 5:00.]" Edit: punctuation

A train. It departs at 14:30, every day, so it's just called "the 2:30" for short.

A 2:30 is a reason to go to the dentist. Just because of the sub I’m in: 2:30 sounds like “tooth hurt-y” (my tooth hurts). So there are many jokes where the time 2:30 is a reference to teeth or the dentist. For example: Q: What’s the best time to go to the dentist? A: 2:30 Edit: to clarify, my comment is a joke. The other commenters are correct; methods of transport (most commonly train unless there is some context that would imply a different form of transport) are often referred to by simply the time they depart/departed from the relevant location. Even when referencing trains, there will usually be some context to suggest a train is involved, but if not, a train is the safe bet.

Two Thirty or half past 2 are my go tos

Some kind of transit system. Train or bus. "The 2:30 train"

This was more common when people got around by train. It’s the departure time. Nobody says this anymore. These days, it’d be 2:30 train/flight/bus.

The public transit that deprted at half past three

~~Those captions are incorrect. It should just be "230," referring to a state road or highway [of the US Numbered Highway System](https://en.wikipedia.org/wiki/United_States_Numbered_Highway_System) or the [Interstate](https://en.wikipedia.org/wiki/Interstate_Highway_System).~~ I guess it could also be like "the 2:30 train/bus," but that's hard to tell from what little context is here. Y'all, calling a highway "the 230" is absolutely a thing people do. In Southern California they call I-405 "the 405" Further edit: I see Weybridge is in England, so probably not a "the \[road number\]" situation, but still.