The rollout of the national broadband network is expected to hit its half way point by the end of June, as it begins to spread into metropolitan areas.

NBN Co says construction is accelerating, but warns that connecting homes in capital cities will cause disruption. The company expects to have reached 5.4 million homes and businesses by June 30, and nine million premises by June 2018, when the end of the rollout will be in sight. “This will…