Hi i am standing the day bashing Trains in Cardiff on the 25th, My main aim is Arriva's Class 142s and 143s, So what Ticket do people think would be best to buy?

Do Stagecoach have en enquiry office in Cardiff? I can't think of one offhand. Cardiff Bus have an office on Wood St across the road from Central Station, but I can't remember if they carry Stagecoach timetables/leaflets.
Not sure that Wood Street office has been open for a while, has it? The only sales presence I saw advertised when in the city last month was a small Cardiff Bus counter inside the central library.
The only tourist information centre also now appears to be at the Millennium Centre in Cardiff Bay, with limited public transport information, so where one gets timetable details for the likes of Stagecoach in person, goodness only knows. Rather poor for the capital of Wales, I thought.