Thanks kerbut, I knew I had forgotten something when I was looking at teh list of equipment, and my Hi Viz was in the door pocket beside me when I was typing up the list. 
I have added it to the list now.
Cheers Denis, I used out of date information and I had forgotten about the change because it is something i have never carried. The one time I needed medical attention over the water in the last 17 years, in Germany, not having the form wasn’t an issue. Added the details to the list now.