Although not frequent, Bedwyn has services from both directions.

 

The Windsor branch certainly is not a Community Rail Line - perhaps more royal than communal - but its viaduct is well over 1500 m long. The Tavy bridge, however, is less than 500 m long however you measure it. Wikipedia has 453 m, implying it has stretched quite a bit in use since it was built, and announced as 1429' long (436 m). More prosaically, I suspect it is now being measured to the ends of the parapets, rather than to the abutment faces; is the latter the "official" way of doing it?

 
* Three GWR stations which - though not terminii - you can only leave in one direction on a passenger train
I had Coombe Junction, Bere Alston and Pilning and had overlooked Bourne End

* Two GWR operated stations between which you cannot buy a ticket
St Budeaus Ferry Road and St Budeaux Victoria Road

* Engineering feature over 7000 metres long and carrying a main line
Severn Tunnel

* Over 500 metres long and carrying a Community Rail line over a river
I had Tamerton Foliot bridge over the Tavy, but the Thames bridge on the Windsor Branch may fit the bill. Is that community rail though?

* A journey on which the last through service leaves at 05:44, a journey on which the last through service leaves at 07:11, and a journey on which the last through service leaves at 07:21 (though not today  Angry )
Paddington to Greenford, Chippenham to Penzance and Melksham to Worcester

* A station which was built in 1850, but did not see its first train until 1857
Bradford-on-Avon

* A railway that was standard gauge for the first 20 years after it opened, then dual gauge, then back to standard gauge.
Truro to Penzance - West Cornwall

* Standard gauge is 4'8.5" - but where in the west was there a railway with a 4'6" gauge
Plymouth and Dartmoor Railway

* Passenger services started on 25th March 1807 and ceased on 5th January 1960
Swansea and Mumbles

* Closed 7th September 1964 and re-opening, perhaps, on 12th September 2027
Portishead

 

Ah, I was going to say Redhill but that's a Southern station.

 

I'm playing the game of "here is the answer - but WHAT question does this address".  Is it the one about many years from being built to its first train?   ...  It may be but not the one I had!

 
Clifton Bridge Station on the Port Z line ...

 

What about Carmarthen (which, like Bourne End, originally had two ends) and Swansea

 

Also Bedwyn no trains to destinations further down the line or from further down the line call there.

 

Portishead.

Good luck with that one. 

 

St Budeaux Ferry Road and St Budeaux Victoria Road

 

Something in the back of my mind said it might be two local Plymouth stations that are close to each other....or has my imagination rather taken over?

 
Fair - so the Low Level & either of the other Worcester stations....

 

Same station, Chris?  - both WOP and isn't it one sequence of platform numbers off a common atrium?

 

Worcestershire Parkway High Level to Low Level.

 

Is this the brick arch viaduct (with bridge at one end) carrying the Slough to Windsor line across the Thames and meadows to the north?

 
I'll guess Heath High Level and Heath Low Level.  I know that you can't buy a ticket between Catford and Catford Bridge (Geoff Marshall made a video about this), and the Heaths are similarly close to each other.
[Edit: probably the wrong answer because they are probably TfW rather than GWR, doh]

 

Yep, that was the other one I had

 
Of course there is allways Pilning which you can only leave in one direction.

 
Pedant alert...

Aren't Carmarthen and Swansea TfW stations?

 
Does Swansea fit this?

 

Not thinking too hard. Okehampton's a temporary terminus. (And Carmarthen's a disgrace).

Mark

 

Yes, and oh my goodness I had forgotten one of them.  There is a fourth (at least) ...


Sadly, Okehampton IS a terminus at present - just like you can no longer carry on from Barnstaple.  I will give you Carmarthen though - and I still have one more that's a bit different.

 

2nd attempt - Coombe Junction Halt, Bere Alston, Okehampton. Is Okehampton a terminus and if it isn't what about Carmarthen? Maybe i am thinking to hard 

 
* Three GWR stations which - though not terminii - you can only leave in one direction on a passenger train

I reckon....

Bourne End
Bere Alston
Coombe Junction

 

Ah, I think that rules out my suggestion for one of the stations, which is Pilning, which I believe you can only travel in one direction from? (towards Bristol)



Edit note: Quote mark adjusted, for clarity. CfN

 

Ah, shows the great danger of trying to write quiz questions.   All three of these you can leave from either end of the station having got on to a passenger train / agreed that the dark green GWR things only go from one end, but there are other train operators around ;-)

Reading the question back, I was looking in our region - to avoid answers such as "Fort William".

 
*Engineering feature over 7000 metres long and carrying a main line.

Severn Tunnel, 7008m

 
**Three GWR stations which - though not terminii - you can only leave in one direction on a passenger train:

Banbury, Basingstoke and Gatwick Airport. - Although I guess technically they are not GWR stations but stations GWR use and you can leave them in other directions with other TOC's. Maybe need to think again

 
Some trivia questions - how many can you answer? Just tell me how many - go ahead and follow up with an answer each too if you wish

* Three GWR stations which - though not terminii - you can only leave in one direction on a passenger train

* Two GWR operated stations between which you cannot buy a ticket

* Engineering feature over 7000 metres long and carrying a main line

* Over 500 metres long and carrying a Community Rail line over a river

* A journey on which the last through service leaves at 05:44, a journey on which the last through service leaves at 07:11, and a journey on which the last through service leaves at 07:21 (though not today  )

* A station which was built in 1850, but did not see its first train until 1857

* A railway that was standard gauge for the first 20 years after it opened, then dual gauge, then back to standard gauge.

* Standard gauge is 4'8.5" - but where in the west was there a railway with a 4'6" gauge

* Passenger services started on 25th March 1807 and ceased on 5th January 1960

* Closed 7th September 1964 and re-opening, perhaps, on 12th September 2027