The Water Safety Code: 

STOP & THINK - Look for the dangers. Always read the signs and
understand what they mean.

STAY TOGETHER - Never go near water on your own. Always have
an adult with you.

FLOAT - If you fall in, float or swim on your back and stay calm.
Throw something that floats to someone who has fallen in.

CALL 999 or 112 - In an emergency call 999 or 112 (coastguard)