Changes to vehicle specification.
Due to modifications to the vehicle you may need to have your HRVIF updated.
The amended form will need to be sent back to the MSUK Technical department with a short note detailing the changes. Depending on the modifications you may need to take other picture etc.
Send that to the MSUK marked for the attention of Michael Duncan with your HRVIF.
It may be as well to photo copy the front page as proof of issue if asked on an event! He will update your form and the copy at the MSUK.
The fee for issue of an amendment sheet is as listed on the MSUK website.