I'm just trying to work this one out, so apologies.
But are you saying that instead of driving to Alton Towers, you'd drive to Stoke railway station and get a train from there?
I'm presuming this as otherwise you'd be getting a muddle of different trains etc.
Stoke certainly doesn't have the space to accomodate large numbers of people parking to use the train. And changing trains isn't especially hard, Stoke is serviced by trains from Derby, Manchester, Crewe (the largest rail hub in the country and only 25 minutes away from Stoke), Birminghan, London and all the stops inbetween, and with trains taking just over an hour from London and arriving every 30 minutes, you're going to get to Towers much quicker then going anywhere near a car.
And this isn't just about getting cars off the road, a good service can mean far quicker journey times...something that will really help pull in crowds from further afield. By Providing ticket services that tie in entrance ticket with rail transport from local stations, Alton Towers can cut out the confusion and let people relax.
I'm more excited about the potential of this news then SW6!