Fly the Flag
(... the right way up)

Broad white diagonal band uppermost goes next to the pole.

If you paint it on your bonnet, roof or boot, convention would have the flagpole on the left as you view it. Therefore if you don't display the flagpole the flag should still be shown with the broad diagonal white stripes uppermost on the left.

While you are at it, why don't you visit the Union Jack Pub (in Washington DC, seeing as they don't deign to tell us - typical Capital-ists) and over an Old Speckled Hen read the Union Jack newspaper.

Click here for a collections of Old Speckled Hen adverts over the years from The MG Car Club V8 Register".