I'm surprised there is no staff channel through security.In HK we had a similar trek to work through the terminal,but the process was vastly quicker as we very seldom had a wait at security.They used to move pax out of the way to let us through.(Royality eh

) We also had to pass through immigration to leave work.No problems.
There was never any gripes about the trip through the terminal.Plenty about where they put the airport though.I think it's the LL creme have never had to pass through airport security before to get to work,and they resent it.
Just wait they'll be moaning that it sways in the wind,making them sick.Also in low cloud cover the VCR is IMC,but the airport is OK.No doubt there will be another £150K found to pamper them again.