News anchor and presenter Carolyn Robinson has left TV3.

Robinson has been with the company for more than 15 years, serving as a presenter for the late news show Nightline, before going on to present 3News as the show's weekend anchor, and filling in for Hilary Barry on week nights.

Robinson also hosted the MediaWorks' consumer affairs show What's Really In Our Food.

TWITTER/CAROLYN ROBINSON Carolyn Robinson and co-presenter Simon Shepherd will be replaced by Melissa Davies and Tom McRae in the weekends.

The network said the mother of three was looking forward to "having her weekends back and spending them with family".

Robinson's departure comes after MediaWorks announced big changes in its delivery of news on Thursday, including the launch of a new multi-platform service - Newshub.

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It integrates 3News and RadioLIVE to become Newshub Live at 6pm, presented by Mike McRoberts and Hilary Barry.

Robinson and co-presenter Simon Shepherd will be replaced by Melissa Davies and Tom McRae for the weekend news spot.

Shepherd will continue to present and report for Newshub.

Newsworthy co-host David Farrier will also not be joining Samantha Hayes in the show's rebrand, Newshub Late.

He is instead leaving MediaWorks to further his interest in documentary-making.