Launch a tabbed page from a tab

Hi,

I am currently bringing FTrack2 (available on the app store) from being iOS only to work with Xam.Forms. The app relies on different parts of the app having different navigation bars. For example, on inspect crops, there are 4 tabs. If I tap on tab 2 it launches a new VC with 3 tabs on. If I tap on tab 4, it launches a VC with a single tab.

If I set up a standard TabbedPage and add the pages on the tabs via Children.Add with one of the tabs launching a new TabbedPage. This works, but the original tabbed page remains on screen.

Is there a way to launch a brand new TabbedPage from a tab that removes the original TabbedPage?

I've tried putting my page in a NavigationPage, but that still gives the two TabbedPages.