The Queen has been pictured after attending a rare royal double christening at Windsor.

The 95-year-old head of state was spotted wearing a lime green hat as she left the joint baptism of two of her great grandsons at the Royal Lodge in Windsor Great Park, Berkshire, on Sunday evening.

Mike and Zara Tindall’s son Lucas Philip was christened alongside the son of Princess Eugenie and her husband Jack Brooksbank, August.

Immediate members of the royal family and close friends joined together for the service, and the Queen’s attendance came after a short break from public duties on the advice of a doctor.

Eugenie, daughter of the Duke of York, was pictured arriving at the royal residence in Windsor just before 4pm on Sunday, while the Queen was photographed leaving in the backseat of a black Range Rover just before 5pm.

Royal christening
Queen Elizabeth II leaves Windsor Great Park in Berkshire following a rare royal double christening (Steve Parsons/PA)

Other royals who were reportedly attending were the Duke of York and the Duke and Duchess of Cambridge.

The occasion marks the first time in modern history there has been a double royal christening in the UK.

In Denmark, the Crown Prince’s twins: Prince Vincent and Princess Josephine, were christened together in 2011.

Royal christening
Princess Eugenie arrives at the Royal Lodge in Windsor Great Park, Berkshire (Steve Parsons/PA)

Until this week, the Queen had been resting for nearly a month on the advice of a doctor.

The monarch had undergone preliminary tests in hospital, and was forced to pull out of the Remembrance Sunday service at the Cenotaph due to back strain.

On Wednesday, the Queen held a face-to-face audience with the outgoing head of the armed forces General Sir Nick Carter, marking her first official engagement since the break.