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Dom Littlewood goes behind the scenes at some of Britain鈥檚 most secure institutions to see how they keep us and the country safe. On today鈥檚 show, he fulfils a childhood dream, riding up front with a train driver as he checks out all the tech keeping the UK's railways safe.

He sees how bouncers are trained to keep the peace on a night out, and home security expert Jenny Donaldson has advice on how to deal with distraction burglary when she meets a guy who unwittingly let a thief into his home.