Make sure that you are extremely cautious about locking your doors properly, shutting windows and activating security alarms and lights.
At night time shut the bedroom curtains to make it look like people are in the house and leave on the television or radio for background noise.
If you are going away for more than simply a few days consider using the Royal Mail's 'Keep Safe' service and having your neighbour take free newspapers into the house if possible.
Cancel your newspapers and milk if you have them delivered, and don't forget to set your timer for the lights.

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