The Queen has arrived in Cambridge to open a £30 million extension to a regional maternity hospital.
The Queen and the Duke of Edinburgh will visit the Rosie Maternity Hospital to see the new facilities for mothers and babies.
The hospital is part of Cambridge University Hospitals NHS Foundation Trust and the Queen will visit the extension's birthing centre, meeting staff and new mothers, while the Duke will tour the neonatal unit to greet staff and families and view medical equipment.
The Rosie Maternity Hospital forms part of Addenbrooke's Hospital.
The site's usual flag was taken down this morning and replaced with the Royal Standard.
Facilities Manager, Robert Bruno, described it as honour.
The royal couple are first visiting the Medical Research Council Laboratory of Molecular Biology, one of the world's leading research institutes, to officially open its new building.
The unit has been nicknamed the "Nobel Prize factory" as scientists working there have been awarded nine Nobels.