Panorama investigates rough justice in Europe. British citizens who are arrested for alleged crimes in EU countries such as Germany, Spain and Portugal are almost never given bail, are often not told what's happening to them and often feel isolated from any assistance the British Consulate is able to offer them. Tom Mangold looks at the cases of four Britons for whom the theory of Europe without frontiers ended in the reality of prison behind bars. When everything else in Europe is being standardised, why not the legal and judicial systems?