The Dart opening date has slipped from the summer of 2021 to the Autumn of 2021 due to late starting of the project. I noticed that part of route is now being worked on 7 days a week.
Dart Maintenance area beyond Central Station
Another thing slipping is the opening of the new drop off zone on the ground floor of the new multistory as that is meant to open this month. At least 3 months late I would guess as the entrance roads haven't even been started yet.
Taxiway Foxtrot is having its signage installed. Think I saw a sign for Taxiway Kilo being installed yesterday which is one of the links from taxiway Delta but I will confirm.
(Edit) The link taxiway between Delta and Foxtrot opposite the drop off zone is marked up as K1