Free Traffic Legal Advice

Hi , i have a 1972 MGB GT registered as a historic vehicle with the dvla .I am placing a new chrome front bumper on the car and didnt fancy drilling holes to fix brackets and a number plate and was hoping to fix a self adhesive one that conforms to BS on the front bonnet as horizontal and vertical as i can get it ...I have seen photos of MGs with plates on the front bumper but when asking on the MG forum i just cant get a definitive answer ,dvla will not give a answer they just point me to the legislation regarding construction of the plate etc...Local bobby i know could not answer either ....I have no problem fixing one on the bumper if it is the legal thing to do but before i do i thought i would try and find out if i can put one on the bonnet before hand..I was told that if it spoils the aesthetics of the car i could put the plate on the bonnet were reasonably practicable ...

There are a few plate companies that will make up a  self adhesive BS plate (not a show plate ) and i would have to send in documents as you would with the standard plate ..if anyone can help on this it would be appreciated but as said i am not going to make a big deal of it if i cant ...Thanks