Jock, it's a simple 62 in a 50 limit on the M1,and all I'm doing is using the fact that you don't legally have to fill out the NIP (notice of intended prosecution) as doing so will self incrimintae yourself. If you use a PACE witness statment, which can't be used in court against you as you've not been given the caution, then you are telling them that you were the driver, but not in a way that can be used in court, alledgedly!
see the bit on pepipoo about PACE.
I'm sure someone else can word it better for me.
Andy