Rod Stewart's wife Penny Lancaster polices Queen's funeral on streets of London

Penny Lancaster has been spotted working as one of the police officers out on the streets of London for the Queen's funeral.

A TV presenter and former model, and also married to singer Rod Stewart, Lancaster completed training to become a special constable in London last year.

With the Queen's funeral being the biggest policing effort in British history, with officers being brought in from all over the UK, it's very much all hands on deck - and that includes Lancaster.

It is even bigger than efforts to police the 2012 Olympic Games, an event which required 10,000 officers on the streets of the capital.

With huge amounts of police on the streets of the capital Lancaster is one of many thousands tasked with keeping London safe during the funeral.

She was spotted in uniform striding through the streets of the capital as she made her way through crowds near Westminster Abbey.

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Lancaster started volunteering for the police after appearing in Channel 4 show Famous and Fighting Crime, where celebrities swapped their day jobs with people in the emergency services.

Husband Sir Rod Stewart told The Graham Norton Show his wife 'loves' volunteering with the police and 'wants to protect the city she loves'.

She met the late Queen and new King Charles III on several occasions as her husband performed for the royals several times.

Sir Rod was also knighted for his services to music, though on that occasion it was the Prince William, the Duke of Cambridge, who performed the ceremony.

Lancaster said the Queen 'could be everywhere all of the time for everyone' and praised the late monarch for her 'omnipresence' in British life.

She also recently told Good Morning Britain how she danced with the new King on what was his 60th birthday.

Lancaster and Steward married in 2007.

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The officers working during the Queen's funeral have all sorts of different duties to perform as part of the 'ring of steel' thrown around London.

Armed sharpshooters are on the roofs keeping an eye out for potential threats, while over a thousand officers have lined the streets to stand between the Queen's funeral procession and massive crowds of mourners.

Many more are working with the crowds to ensure things don't get out of hand and keep an eye out for potential threats lurking among the mourners.