I am but a lowly civvie, but I have been selected for the Help For Heroes Big Battlefield Bike Ride (www.helpforheroes.org.uk). In order to raise the required sponsorship I am collecting items for a charity auction next year. I have bought 2 packs of the British Army Top Trumps cards to get signed by the CO's or a member of each unit represented. What is the best way to get this done? Approach MoD? How do I get the required info without getting arrested? Any help/guidance would be appreciated.