All outside doors should be fitted with a good quality lock which conforms to British Standard 3621 (look for the kite-mark) which guarantees that a lock has been approved by the British Standards Institution. Their tests include resistance to picking and drilling. The lock should have a 5-lever mechanism which gives up to 1000 key variations.
If your outside door has a window in or near it, fit a deadlock to the door; this doesn't click shut but is operated by a key. Make sure you don't leave the key in the door or a burglar will simply walk off with your possessions.
Sliding patio doors should be fitted with key operated locking bolts mounted at the top and bottom at opposite corners. Fit special anti-lift devices so that sliding doors can't be lifted from their tracks. To prevent a sliding glass door from being opened, place a pipe or stick in the bottom track.
If you have basement windows, protect them by securing window bars or a metal grille into the brickwork.
On cars
Do not try to force a frozen car lock open - the key may break off. Check the lock on the passenger side. It may not have been affected by the frosty spell.
Or heat the key with a match or lighter, then insert it into the lock. Repeat until the lock thaws.
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