The Dominion Theatre is a massive space, it is one of the largest auditoriums in London and it is currently home to Big which has a limited run there starring Jay McGuinness in the Tom Hanks role alongside Kimberley Walsh from Girls Aloud, Matthew Kelly from Stars in Their Eyes and Wendi Peters from Corrie. I saw it on Monday in previews and was pleasantly surprised.  I was expecting something more akin to a jukebox musical so was happy when I saw that it was a score with original songs.  The set is beautiful evoking the suburbs where Josh lives, the city of New York as well as specific interior…