JulietNovemberPapa,
You flight arrives at 1725 right, so give 20 minutes for everything (disembark, passport control, hold luggage if you have).
That means you wont exit until around 1745, and if you have a chance you will be able to catch the 1749. This gets you there for 1838 which is plenty of time to wonder around the train station for your 1910 rail journey (wherever that maybe).
If you miss the 1749 journey, don’t panic. There is another at 1818 which will get you into the BUS STATION at1856. Now probably there will change over of Drivers (night driver getting on). Then departs from 1900 and is given 6 minutes to get around to the rail station which I wouldn’t think it would take that long. This then gives you 4 minutes to get to your train etc.
If push comes to shove and you don’t want to take the 1818 journey then the best idea for you is to use the B&W taxis which will get you to the entrance of the station in about 20 minute, something our Buses cant do.