Didn't bobm already get no.2 right?
2. Swindon's "other railway" through Old Town - the M&SWJR.
Southampton Airport and Steam, Swindon are correctly identified - sorry, other are not Manchester nor the Midland and South West Junction, though I can see why you might think those!
For the avoidance of doubt, the Midland and South Western Junction is sometimes called Swindon's other Railway. it was "Steam, Swindon" (No 5) that was correct.