​BMW unveils armoured X5 'Security Plus'

BMW

You're a billionaire plutocrat/paranoid pop star/mafia boss/tank fan (delete as applicable). You need a new off-roader that can deal with hand grenades on your commute to the office/studio/underground bar/shooting range, has four-wheel-drive for off-road escapes and serious firepower under the bonnet to keep you ahead of the baddies. So what do you buy?