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•Google and Apple urge Obama to block smartphone surveillance Domestic CCTV can be installed for as little as £50, so it's potentially a cheap way of improving security at your home.
You can spend thousands on a top-of-the range system, and this could pay dividends if you ever need to use to footage to identify a criminal suspect.
You might think they could also be useful to catch things happening outside your home, such as antisocial behaviour, or traffic incidents like Lucie's hit-and-run.
But many people don't realise that you now have to be very careful about what you film and where your cameras are pointing.
As well as the obvious benefits for your peace of mind, and the help it provides when catching criminals, the security systems can deter potential burglars, keeping your insurance premiums down.
The jury is still out on the actual effectiveness of CCTV in public spaces, but it seems to have the biggest deterrent effect in pre-planned crime, so a visible camera may stop your house being specifically targeted.
It's also worth noting that the ICO have never yet prosecuted anyone for contempt of court under data protection law.
Police advice says that for private households, better lighting, alarm systems or locks are more important to security than a CCTV system.
You can also get arguably the same deterrent effect with a dummy CCTV camera - but experienced thieves may not be fooled.
Dr Dean Wilson, Associate Professor in Criminology and Criminal Justice Studies at the University of Plymouth, says that home CCTV might prove to be worth it in cases like Lucie's.
Lucie escaped with cuts and bruises - and the whole thing was captured on the family's home CCTV.
The horrific footage powerfully shows the dangers of cycling on pavements, and has played a part in a public campaign to identify the cyclist responsible.