Batman and Union Jack

I've always liked the look of Union Jack.  I first encountered the character during the classic run of Captain America by Roger Stern and John Byrne.  He seemed cool to me so I checked out his adventures as part of the Invaders as well.  Comic characters with costumes based off of a flag motif are pretty common, but I think that Union Jack's is the most successful.  It is at once patriotic, intimidating and utilitarian.