Help Me Please- Number Plate BIG Problem

[Crimson King 500]

I had the Griff MOT'd last week, it failed all because I had the wrong plates on the back, now got new ones that are see thru, I have lined the opening with silver foil and I have cleaned up the lights, but I still reckon that it will fail as it is still very dimly lit.
Help me please, resorted to ordering another plate from another source today, but have you tried getting plates these days, new laws, dictate that they need a utility bill, proof of ownership and your driving licence!
Thanks Folks.
CK500

[Crimson King 500]

Good news she passed, but the last tip about the vanity mirrors is a good one to bear in mind.
Thanks.