If the worst happens and a pipe freezes, then follow these simple steps:
Turn off the water supply coming in to your property at the stop tap
Open the affected tap to allow the water to escape as it thaws
Slowly thaw the pipe with hot water bottles or a hairdryer on a warm setting
Never use a naked flame or blowtorch to thaw the pipe.
Call a WaterSafe recognised plumber who is qualified to work with the drinking water in your home if you need help.