How much work is necessary at 09L alongside T5 to allow a full flow of departing traffic
Current plans are for a new lead-on to 09L and new links between Alpha & Bravo taxiways in that area.
More work is required to provide Rapid Exit Taxiways for 09R to give access to either CTA or T4 (current RETs only serve 27L).
As for T4 departures from 09L - take a good book to read !!