On track . . . Trustpowers 100 Oamaru staff are expected to move into the companys new purpose-built premises in Severn St in late August. PHOTO: REBECCA RYAN Mercury NZ Limited has committed to retaining Trustpower’s Oamaru office for the “foreseeable future”, after agreeing to buy the New Zealand company’s gas, telecommunications and retail electricity supply business for $441 million. On Monday, Trustpower announced the sale to Mercury, conditional on Commerce Commission approval, the restructure of the Tauranga Energy Consumer Trust and Trustpower shareholder approval. Trustpower has had a customer service centre in Oamaru since 2007, when it bought the Call South telecommunications business. In February last year, it announced plans to move from its Thames St site to a new purpose-built premises in Severn St, and construction started about four months later.