Now this is the sort of thing that would really bemuse people in the UK. We don't go in for flying the national, Union, flag - a far more likely display of a flag would be at a sporting event where the appropriate flag for England, Scotland, or Wales would be flown/worn/painted on faces, or perhaps a small car sticker, or even a county flag sticker especially for places like Devon and Cornwall or Northumberland, a long way from London. People seem to far more interested in being from their little, sometimes very little, bit of the Union than a part of the Union as a whole.
We also don't generally attach much importance to where we were educated, unless it was Oxbridge of course, so while you'll see University tops and things, usually worn by students or tourists, the likelihood of someone displaying it on their garden bench would be close to nil.
Wheels from old farm implements are a different matter, though!
Adrian