Military gear is cheap and cheerful and good value and reasonably functional but not the highest performance. As for the latest ACU type military uniform, I personally think they look like camo jimjams so I wouldn't want to wear them outside in public.

An 82nd Airborne patch or two might come in useful along with some pips (pips and or crowns in the UK) in the same way a 'Qui audet adipiscitur' cap badge might work out in the UK. Could get you through those TAs or the National Gaurd checkpoints to freedom a whole lot quicker but you would probably need a goatee and some Oakleys as well. (plummy southern accent is required for the UK, unless your trying to escape from Glasgow of course, which could well prove to be difficult.)

Anyone else remember those sneaky Jerries changing the signposts to point in the wrong direction in the film 'Battle of the Bulge'.