A man has died after falling from an upper floor balcony of the London Stock Exchange in Britain.

Police and ambulance crews were called to the scene after the man was said to have fallen from a glass walkway inside the building.

A police spokesman said officers were alerted to the fall at about 10.00am.

Paramedics were also in attendance and the man was pronounced dead shortly afterwards.

"The City of London Police is currently investigating the circumstances around the death and the incident is being treated as non-suspicious," said the spokesman.

"We are now working to inform the man's next of kin."

The London Stock Exchange Group confirmed an employee had fallen to his death in the building.

"The emergency services were called immediately and are dealing with the incident. We will continue to offer them every support and cooperation possible," a spokesman said.

Some brokers have offices at the exchange's headquarters in London's financial district.

The London Stock Exchange, which dates its history back to 1698, is one of the world's oldest stock exchanges.