Trip Through Platform Nine and Three Quarters

I mean, literally 'Trip' through Platform 9 and 3/4. It was another day of exploring on their school trip to England from their home in Ireland, when a group of friends accidently get off the bus on the wrong stop and end up at Kings Cross St. All being Potter fans, went to get their pictures taken, only when a small accident takes place, weird things happen. CD/OC , FW/OC , OW/OC