The National Cyber Security Centre in London opens on Tuesday, aimed at protecting the UK against cyber attacks. Technical Director Dr Ian Levy demonstrated how smart devices – and even toys – could be a security threat in your home. My child could not sleep for months after a story went around the school about an app that spied on little children. We had to get a dog after a year of sleepless night. It is great that we have social media to warn us about specific threats but it is a nightmare when taken out of context. Luckily, I now have a guard dog that has a bark that will scare anyone off but lets my daughter sleep through the night.