A lot of the building will be pre-fabricated off site, in an aim to cut construction disruption. The first pier and extra apron will take about 2-3 years, but, as they learn the process, they expect the other piers to be finished very quickly.
The final plans are some way off yet, so, I suppose the timings are still fluid.
The walk from the end of pier B to the T2 main building is going to be a long one. I would have suggested travel atoms, but, let's face it, MAN doesn't exactly have a great track record of keeping the ones they have running!.....