You should display the Blue Badge where it can be clearly read through the windscreen of your vehicle. The front of the badge should face upwards, showing the wheelchair symbol.
If those are , in fact , the rules , it only says 'The front of the badge should face upwards, showing the wheelchair symbol' . There is no ruling on whether or not the top edge of the front side needs to be placed uppermost - therefore there is NO written prohibition on the badge being displayed right way up / sideways / upside down , or at some intermediate angle . As long as the correct side of the badge is visible with the relevant information readable by a parking attendant , further objections can only be pedantic .
Unless it can be shown that such a rule exists , and was sent out along with the Blue Badge , there is a very good prospect of a court overruling this decision .
However , despite having said the above , the first port of call should be your elected representative ( who always needs your vote ) , one phone call from whom will usually result in the ticket being waived .
If the councillor can't ( or won't ) help , Unless it can be shown that such a rule exists , and was sent out along with the Blue Badge , there is a very good prospect of a court overruling this decision .
Another useful avenue to explore is the power of the local press - newspapers just love to publish stories about the underdog , disabled driver being fined by the faceless bureaucracy over a trivial indiscretion and having the appeal turned down when no real crime had been committed . A photo on the front page of the local paper showing your friend holding the ticket next to his upside-down badge would hardly enhance the council's PR .
Although not strictly their responsibility , we have elections days away - prospective parliamentary candidates will be falling over themselves to be seen as worthy of your votes and particularly helpful at this particular time with simple matters such as this .