In an emergency, call - 999
Police
Ambulance
Fire & Rescue
Coast Guard
International Emergency number - 112
This operates exactly the same as 999 and directs you to the local emergency call centre.
112 will work on any mobile handset registered anywhere in the world, and can also be dialled from a locked phone
Calls are free and emergency call centres offer a translations service
Both 999 & 112 also accept SMS Text Messages