The current operation will retain two Intermediate Directors and a Final Director (with a Support controller for the INTS when necessary). The new runway will have its own Intermediate Director and Final Director.
Also, depending on configuration (i.e. which of the main runways is operating arrivals) there would be a requiremet under ICAO for a monitoring Controller for each of the Final Approaches. This would only be necessary when the Centre runway operates arrivals as the spacing between this and the new approach would be about 1500m. (Spacing New to Southern would be about 2,800m.)
This has been simulated at TC and the Approach concept seems sound. There will be implications for the TMA though!
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