The real answer to what Paul is driving at (note the pun ... and yes, it can be argued that Brunel's bridge is best seen from the train) is:-
"It really depends where you're coming from, and where you're heading to"!
That is, if you're travelling from the Midlands, how come you're contemplating passing by Plymouth-Saltash at all?
On the other hand, if (like me) you prefer to take your time and follow the more scenic routes ... why not pass through Bristol? That way you could take in I.K.B.'s famous suspension bridge at
Clifton, as well!
