Chamber Music NZ presents Heath Quartet Monday 2 July 7.30pm The Piano, 156 Armagh Street, Christchurch   One of Britain’s most exciting chamber ensembles.   Programme: Bach | Chorale Preludes      Gareth Farr | New Work (CMNZ Commission) Haydn | String Quartet No.55 in D Major, op. 71, no. 2 Britten | String Quartet No. 2...