After parking restriction signs went up this week, Royal Baby prep continued at the Lindo Wing at St. Mary's Hospital in London, where Duchess Kate is set to give birth to her second child -- see new photos. Credit: Max Mumby/Indigo/Getty Images

They're lining up! After parking restriction signs went up this week, Royal Baby-palooza prep continued on Wednesday and Thursday, April 16, outside of the Lindo Wing of St. Mary's Hospital — where Kate Middleton is set to give birth — including the presence of several monarchy supporters.

Fans, draping Union Jack flags over their shoulders, lined up outside of the facility on Thursday, as workers secured the perimeters ahead of the birth of Prince William and Duchess Catherine's second child.

Staffers also erected security barriers outside of the hospital wing, where Middleton stood on July 23, 2013, and presented her newborn baby son Prince George. Middleton will be under the care of the lead surgeon-gynecologist to the royal household, Guy Thorpe-Beeston, when she goes into labor.

Us Weekly exclusively reported this week that prices to stay in the Lindo Wing, where the Duchess was for the birth of her first child, have gone up. A suite of two rooms now costs $9,650 (£6,570) for a one-night stay, but the royals have received a "loyalty discount" of 10 percent off, given that it's the Duke and Duchess' second time at the hospital.

All press and fans will be allowed to assume their positions once the Duchess has gone into labor, the Palace confirmed this week. The Duchess, herself, confirmed last month that the baby is due "mid-April to the end of April."

Us Weekly will be on the scene live, so stay with Us for the latest updates — including when the Duchess goes into labor, gives birth, and more.