In an emergency in the UK, dial 999 and ask for the Coastguard. If you are at sea, use GMDSS systems to make a distress or urgency alert:
Emergency Contact - Dial 999 and ask for the Coastguard
The email address above must not be used to pass operational SAR information. These contact details are for office hours only. Please scroll down for contact information for the Coastguard Operation Centres.