I always thought from previous pictures of the development that the Pier Link would butt up against the undercroft wall(right hand side of your photo) and would be over the delivery/access road.
Do you know if they still intend to have this undercroft access in the future because i can't see on the road layout how they will gain access?.
I also thought it would butt up against the undercroft wall. The plans shows no service road being kept as there is two more bus bays to go in and a taxi rank BUT on the new section of ring road that has been put in next to the new drop off zone a permanent sign that has been put up and temporarily covered says Goods Deliver Zone 2. So it might be the case that a service road will sit between the pier and the drop off zone and run the full length of the pier before it uses the existing undercroft.