If you require urgent medical assistance, call 999 now.
https://www.defibfinder.uk/
The above website is used to locate defibrillators but is not intended for use in an emergency.
To register your defibrillator(s)
The Circuit launched in 2021 and is the national defibrillator network which maps defibrillators across the UK, connecting them directly and automatically to each ambulance service. Always dial 999 immediately in an emergency and they will direct you to your nearest defibrillator.