Jiggy McCue: The Iron, The Switch and The Broom Cupboard by Michael Lawrence
Jiggy only jumped into the school broom cupboard for two minutes to avoid a teacher. So when he emerges from his hasty hiding spot into a parallel universe, he's not impressed! And there's not a lion or a witch in sight...In this new world, Jiggy finds he has swapped places with a boy called Juggy who is about to go on a school trip - a trip to compete in the UK Extreme Ironing Championships...