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West London NHS Trust > Contact us > Our sites and locations > Broadmoor Hospital > The Broadmoor siren

The Broadmoor siren

If you live in Crowthorne or the surrounding area, you’ll be familiar with the sound of the Broadmoor Hospital siren, which is tested every Monday morning at 10am.

The wailing siren is sounded for two minutes, followed shortly later by the all clear continuous siren for two minutes.

The siren was introduced in 1952 following an escape from the hospital and recommendations from an independent inquiry. The siren was last activated to warn of an escape from the hospital in 1993.  Since that time there has been significant investment in improving security at the hospital including the installation of a second perimeter fence and additional alarm and control systems.

In addition to the sirens, the hospital has arrangements in place with the local authorities for the immediate notification and cascade of information to all local schools. These arrangements are tested at the beginning of each term. The hospital also has emergency plans in place with Thames Valley Police.

In the event of an incident at the hospital, we would also post updates on the website to keep the public informed. Arrangements are also in place to keep the media informed.