Hello

[b1k3rdude]

• The DVLA won't know and the Police certainly wouldn't have a clue.
  
• Its only the insurance that would ever have something to say (should the need arise).
  
• I'd say as long as you actually have it restricted with a legitimate restriction kit, have all the paperwork to say so, then you will be perfectly fine.
  

• You don't have legal obligation to tell the DVLA anything, or the police. But for ease of life, keep a laminated copy of the fitment invoice under the seat for when your pulled over.
  
• See my post below.
  
• Correct, see my post above.
  

That seems to be the issue when getting it insured as some insurers will put up a fight because they don't believe it's legal.

Nope, all they will ask for at inception of the policy is a certificate of fitment.