This has been 'in the works' for a year now. While the ACU et al seem to be panicking, the MSA is extremely cool about it in their Annual Report for 2016.
Quotes of that, links to explanatory papers and to the Gov.Uk "Discussion document", which invites your comments, are here on the TR Register. I think you can read it if you are not a member:
http://www.tr-register.co.uk/forums/...sport/?hl=vnuk
John