IT is not hard to warm to what this excellent new Disney animated fantasy has in store for its all- ages audience. When the royally bred Elsa ( Idina Menzel) loses command of her mystical power to generate ice and snow – plunging the whole of her kingdom into an endless winter – she goes into hiding in the mountains. Elsa’s plucky younger sister Anna ( Kristen Bell) is understandably concerned and begins an urgent search. Frozen melts the iciest resistance by virtue of quality writing, vibrant visuals ( well worth the 3D premium surcharge) and a brace of catchy musical set- pieces. The pacing is sprightly, the story is deceptively involving and the voice cast meet the challenge of balancing comedy, drama and song with consummate ease.