Bridge theatre, London Stephen Sondheim and James Lapine's fairytale adventure follows its archetypal characters into real-world emotion, brilliantly drawn and sung Can Stephen Sondheim and James Lapine's eternally imaginative Grimm brothers mashup ever disappoint, when its book is so clever and it is driven by the most gorgeous (if tricky) music? Jordan Fein's production shimmers and shines with all the humour and p…